SPECIAL-PROCESS OUTSOURCING
Controlled shot peening outsourcing and managed capacity
Controlled shot peening without building another special-process department
SP Center provides controlled shot peening through operating models matched to the customer’s volume, logistics, equipment and approval route. A manufacturer can outsource the processing, capacity, specialist people, maintenance and infrastructure while retaining the technical control and customer approvals that must remain with the design authority or contracting organisation.
Is it better to outsource shot peening or bring it in-house?
For many manufacturers, outsourcing controlled shot peening remains the stronger economic and operational option until stable recurring external spend approaches approximately EUR 800,000 per year. This figure is the SP Center practical make-or-buy benchmark, not a universal break-even point. It marks the level at which a serious in-house total-cost-of-ownership study normally becomes worth undertaking.
Buying a shot peening machine is comparatively straightforward. Owning a stable, qualified and auditable shot peening capability requires equipment, utilities, extraction, tooling, controlled media, competent personnel, process engineering, quality controls, maintenance, EHS management, records, customer approvals and a recovery plan. Even above EUR 800,000 per year, insourcing is justified only if demand, utilisation, programme life, staffing, qualification and continuity assumptions support the complete system.
The deeper engineering analysis belongs in SP Center’s knowledge-base guide, In-House Shot Peening vs. Outsourcing: Cost, Control and Decision Framework. This service page focuses on the operating model SP Center can deliver.
How does SP Center use the EUR 800,000 make-or-buy benchmark?
The benchmark is a management screen. It is not a promise that an internal process becomes profitable at a fixed spend.
| Stable recurring annual shot peening spend | Practical interpretation | Management action |
|---|---|---|
| Below about EUR 400,000 | Outsourcing usually deserves first consideration because specialist fixed costs would be spread over too little internal demand. | Compare standard outsourcing, reserved capacity and hybrid backup before funding an internal cell. |
| About EUR 400,000-800,000 | The result is sensitive to logistics, complexity, programme length and realistic utilisation. Outsourcing or a hybrid model often remains attractive. | Build a detailed comparison using identical volume, quality, service and continuity assumptions. |
| About EUR 800,000 and above | A full in-house TCO study becomes commercially reasonable. The threshold is not an automatic insourcing decision. | Model the complete capability, customer approvals, redundancy, staffing and downside scenarios. |
The practical threshold can move substantially. A long, stable, single-media programme with high utilisation supports an internal case earlier than a volatile mix of low-volume parts, multiple media, frequent changeovers and demanding approval routes. Large or heavy parts may support managed on-site processing because transport drives the decision. A short programme may remain unsuitable for internal capital even at a high annual run rate.
Why do manufacturers outsource controlled shot peening?
Outsourcing changes the form and ownership of cost. It can convert dedicated CAPEX into purchased capacity, fixed specialist staffing into a defined service, machine-maintenance exposure into supplier scope, and an internal infrastructure project into a qualified external process route.
The business value is broader than a unit-price comparison:
- Capacity can scale within an agreed forecast and service model.
- Specialist process engineering, media control and maintenance are shared across programmes.
- The customer avoids creating a noisy, dusty and wear-intensive department beside machining, assembly or precision production.
- An external or hybrid route can provide overflow, a launch route, a second source or coverage during internal maintenance.
- Existing equipment can sometimes be transferred to SP Center instead of being scrapped or left underused.
- High-volume programmes can be evaluated for SP Center equipment and personnel at the customer’s site.
Outsourcing does not remove the manufacturer’s supplier-governance, design or customer obligations. It places execution and the agreed operating responsibilities with the party that can manage them efficiently.
Why is machine price the wrong comparison?
Machine price covers only the most visible asset. A credible internal business case must fund and sustain the complete capability.
Equipment and process hardware
The equipment scope may include the peening machine, pressure or wheel systems, robot or manipulators, automation, part handling, fixtures, masking, controls, media recovery, separators and process-monitoring hardware. Part-specific tooling and programs remain a cost even when the base machine already exists.
Factory infrastructure
An internal cell needs suitable electrical supply, compressed air, extraction, filtration, media transport, floor space, foundations where needed, acoustic treatment, material flow, installation and commissioning. Available compressor capacity must be assessed at the required pressure and flow under production conditions, not from a nameplate assumption.
People and coverage
The organisation needs process engineering, trained operators, quality support, maintenance, automation support, EHS input and calibration or metrology support. A one-person competence model does not cover shifts, holidays, sickness, turnover or recovery after a failure.
Quality and qualification
The process route may require Almen-intensity verification, saturation curves, coverage acceptance, media checks, calibration, validation samples, PPAP or FAI evidence, traceable records, customer source approval and controlled change. The exact requirements come from the drawing, specification, contract and customer flow-down.
Maintenance and continuity
Nozzles, hoses, valves, flow-control devices, filters, separators, fixtures, manipulators, robots, sensors and wheel components where used all need planned inspection and replacement. The business case also needs critical spares, service availability, software and program backups, restoration steps and any requalification after significant repair or change.
Compliance and EHS
Applicable management systems, customer-specific requirements, audits, occupational noise and dust controls, waste handling, compressed-air safety and explosion-risk assessment form part of the operating cost. ATEX requirements apply only where the materials, dust and installation create a potentially explosive atmosphere.
Why is shot peening a controlled special process?
Controlled shot peening is not abrasive cleaning or cosmetic blasting. It uses a qualified stream of defined media to create beneficial compressive residual stress in the component surface. The approved result depends on a controlled combination of intensity, coverage, media condition, flow, velocity or pressure, nozzle or wheel condition, position, angle, working distance, exposure, masking and part handling.
Almen intensity and a saturation curve verify the energy delivered by the process route when the governing requirement invokes them. Coverage describes how completely the specified surface has been impacted and must be assessed by the approved method. Neither value alone proves that two machines, sites or process routes are interchangeable.
Computer-monitored equipment can improve observation, traceability and response to defined process inputs. SAE AMS2432E does not turn monitoring into process development or engineering approval. Fixtures, access, media control, component coverage, records and change governance still require competent decisions.
For technical detail, link to Almen intensity in shot peening, shot peening saturation curves and media contamination in shot peening.
What people and competencies are required in-house?
An internal process needs more than one capable operator. The organisation must retain enough competence to set up, release, run, inspect, maintain and recover the process across the planned shift pattern.
- A process engineer interprets specifications, develops the route, controls programs and tooling, and evaluates change.
- Trained operators set up equipment, verify preconditions, run the approved cycle and react to alarms or abnormal media behaviour.
- Quality personnel review records, calibration, coverage evidence, nonconformity and release criteria.
- Maintenance and automation personnel keep mechanical, pneumatic, extraction, sensor and control systems capable.
- EHS personnel assess noise, dust, waste, compressed air and any explosion risk.
- Calibration or metrology support maintains the measurement chain.
- Qualified substitutes preserve coverage during holidays, sickness, turnover and multiple shifts.
Concentrating process knowledge in one operator or engineer creates a hidden single point of failure. A complete staffing model prices competence retention, training, authorisation and succession, not only direct cycle labour.
What quality, qualification and certification questions matter?
The required quality route is programme-specific. ISO 9001, EN 9100/AS9100, IATF 16949, PPAP, FAI to the applicable 9102/AS9102 revision, SAE/AMS requirements, customer-specific requirements and Nadcap can all be relevant, but they do not automatically apply to every part.
Before quotation or transfer, confirm:
- the governing drawing, specification, revision and customer clauses;
- whether the processor, site, equipment or route requires customer source approval;
- the qualification samples, tests, PPAP, FAI or validation evidence;
- calibration, MSA and capability requirements where invoked;
- traceability and record-retention periods;
- change-notification and requalification triggers;
- the exact certificate or accreditation scope required by the contract.
Nadcap is not a blanket requirement for all shot peening. It matters when the aerospace customer, contract or source-approval route invokes the relevant accreditation and scope. Never infer accreditation from a general quality certificate. Verify the current site and process scope before committing the route.
SP Center’s current certificates and their scopes are published on the Certificates page. The IATF certificate shown there has a stated scope of shot blasting; it should not be represented as proof of IATF-certified shot peening unless the certificate scope is formally updated or otherwise confirmed. EN 9100/AS9100 and ISO 9001 coverage should likewise be checked against the current certificate and project requirement.
Why is media management a process of its own?
Peening media changes through use. A controlled system has to purchase the correct grade, identify and store it, protect segregation, screen and classify it, check size, shape and hardness as required, replenish the working mix, remove broken or unacceptable particles, prevent cross-contamination and dispose of waste correctly.
Multiple media types increase storage, changeover, cleaning and contamination-control requirements. Stainless steel, conditioned cut wire, cast steel, glass and ceramic media cannot be treated as interchangeable inventory. The drawing and process specification determine which medium and control regime are acceptable.
Media management also affects continuity. An internal business case should include minimum stocks, supplier lead time, incoming verification, replenishment rules and recovery after contamination. A low machine rate can hide a high media-control burden.
How can maintenance degrade process capability before the machine stops?
A shot peening machine may continue cycling while its process capability drifts. Nozzle wear can change the stream; hose and valve condition can affect flow; separator performance can change the working mix; filters and extraction affect the environment; worn fixtures alter positioning; robot, manipulator or sensor issues affect motion and detection.
Preventive maintenance must therefore connect equipment condition to process risk. It should define inspection criteria, replacement limits, critical spares, software and program backups, post-maintenance verification and requalification triggers. Maintenance completion is not the same as process release.
The internal knowledge-base guide How shot peening machine condition affects process quality provides the deeper technical explanation.
Is shot peening noisy, dirty and maintenance-intensive?
Industrial shot peening can generate substantial process noise, dust, worn media, escaped particles, filter load, housekeeping work, PPE requirements and waste-management duties. The amount depends on the media, workpiece material, enclosure, extraction system, loading method and production rate. A specialist facility is designed around those realities; a machining or assembly plant may otherwise introduce a new environmental and maintenance burden into its production system.
Noise must be assessed at the workplace. EU Directive 2003/10/EC sets daily exposure action values at 80 and 85 dB(A) and an exposure limit value of 87 dB(A), subject to its measurement rules and national implementation. These values do not mean every shot peening installation exceeds a limit. They explain why acoustic design, measurement, work organisation and hearing protection cannot be left outside the business case.
Dust control requires effective enclosure, extraction, filtration, cleaning and safe waste handling. Compressed-air systems, doors, interlocks and PPE must be included in the risk assessment and maintenance plan.
Does every shot peening installation require ATEX?
No. ATEX applicability depends on whether the workpiece, media, generated dust, extraction configuration and operating conditions can create a potentially explosive atmosphere. The answer must come from a documented site- and process-specific risk assessment.
Where combustible dust risk exists, the assessment may need to address dust characterisation, release points, extraction, grounding and bonding, ignition sources, housekeeping, zoning, suitable equipment, explosion isolation or protection, documentation and training. EU Directive 1999/92/EC addresses worker protection in potentially explosive atmospheres; Directive 2014/34/EU addresses equipment and protective systems intended for such atmospheres.
An outsourcing proposal should state which party supplies the process data, owns the workplace risk assessment, provides site infrastructure and maintains any explosion-protection system. Those responsibilities differ between processing at SP Center and a managed cell at the customer’s site.
What happens when the internal machine stops?
An internal shot peening cell can become a single point of failure. Recovery may require specialist diagnosis, a critical spare, OEM service, robot or control support, program restoration, verification of media and tooling, and controlled release or requalification after repair.
Management should ask:
- Which component stops the entire route, and is it stocked?
- How quickly can competent service reach the plant?
- Are machine programs, recipes and robot data backed up and restoration-tested?
- Are alternative operators and maintenance staff authorised?
- What verification is required after a significant repair or parameter change?
- How many days of finished or semi-finished stock protect customer shipments?
- Will a qualified external supplier still be required as backup after the internal investment?
If the external backup route is not already authorised, qualified and operationally usable, it is not a real contingency.
How much does unused shot peening capacity cost?
A machine incurs depreciation, floor-space cost, maintenance, calibration and competence-retention cost even when no good parts leave the cell. The relevant utilisation measure is not theoretical machine hours. It is accepted good-part output after changeovers, maintenance, trials, media work, alarms, quality holds and production mix.
One-, two- and three-shift assumptions must include actual staffing and support coverage. Seasonal demand, short batches and incompatible media can reduce effective utilisation even when annual volume appears high. OEE can be useful, but only if availability, performance and quality losses are measured honestly for the peening route.
Outsourcing lets a specialist spread unused-capacity risk over several customers and programmes. Dedicated or on-site models price that risk differently, usually through volume commitments, reserved windows or contract duration.
Which shot peening outsourcing models can SP Center evaluate?
Outsourcing does not mean only shipping parts to an external supplier. SP Center can evaluate six operating models, subject to technical feasibility, capacity, customer approval and an agreed contractual scope.
Model 1: Standard process outsourcing at SP Center
The customer ships parts to SP Center. SP Center performs the agreed controlled shot peening scope with SP Center equipment, qualified personnel and process controls. This model can suit prototypes, serial work, overflow, launch support and second-source qualification.
The quotation should define part introduction, tooling, media, batch or unit work, inspection, records, packaging, transport interfaces, lead-time basis and change rules.
Model 2: Dedicated or reserved capacity at SP Center
SP Center may evaluate dedicated tooling, programs, reserved production windows, customer-specific documentation, a defined media strategy and agreed contingency arrangements for a programme. Reserved capacity normally needs a forecast, minimum commitment or long-term commercial basis.
Dedicated capacity does not automatically mean a fully segregated machine or unlimited priority. The contract must define what is dedicated, how utilisation is planned and which contingency is included.
Model 3: Customer-owned equipment operated at SP Center
For a suitable project, the customer’s existing shot peening machine or related production equipment may be transferred to the SP Center facility while the customer retains ownership if contractually agreed. SP Center can evaluate installation, infrastructure integration, operation, staffing, maintenance, daily production and process or quality control according to the agreed technical and contractual scope.
This model can preserve validated equipment, tooling and programs while freeing factory floor space and removing a non-core process from the customer’s plant. Asset ownership does not by itself determine responsibility for maintenance, legal compliance, customer approval or loss. The contract and transfer plan must assign each responsibility.
Model 4: Equipment takeover or asset transfer
Where a long-term agreement supports it, SP Center may evaluate purchasing or otherwise taking over customer equipment and then supplying processing capacity back to the customer. The model can support closure of an internal department, factory-footprint restructuring, specialist-staff shortages or retirement of a non-core asset.
Commercial feasibility depends on asset condition, documentation, remaining life, relocation cost, utility fit, qualification status, customer approvals, volume and contract duration. This is an individually structured option, not an unconditional offer to acquire equipment.
Model 5: Hybrid outsourcing
A hybrid route combines approved internal and external capacity. The customer may retain base demand in-house and use SP Center for peaks, complex parts, maintenance periods, new programmes or emergency backup. A dual-source strategy can reduce capacity risk if both routes are authorised, qualified and actually usable.
The two routes need an explicit applicability and change-control plan. Similar Almen intensity and coverage do not make equipment, media, tooling or sites automatically interchangeable.
Model 6: SP Center equipment and personnel at the customer’s site
For selected long-term programmes, SP Center may evaluate installing SP Center-owned shot peening equipment at the customer’s manufacturing site and operating it with SP Center personnel. The process stays inside or next to the customer’s production flow while SP Center manages the specialist capability within the agreed scope.
The scope may include machinery, dedicated tooling, trained operators, process engineering, setup and optimisation, media management, preventive maintenance, service, process control, production records, traceability, defined calibration or verification, spares, shift coverage and contingency. The final contract must assign facility, utilities, EHS, customer approvals, scheduling, maintenance boundaries and backup.
Managed on-site shot peening can suit high volumes, heavy or difficult-to-transport parts, tightly integrated production, low-WIP objectives and long, stable programmes. It is usually unsuitable for irregular low-volume demand because dedicated equipment and staffing need sustained utilisation.
Why can equipment transfer change the make-or-buy answer?
A customer may already own machines, fixtures, approved programs and customer-qualified equipment. Traditional make-or-buy logic can then favour continued internal operation simply because the capital has already been spent. SP Center can evaluate a third route: relocate the existing capability to a specialist facility and operate it under an agreed service model.
This route may retain the productive value of the asset, release floor space, reduce internal staffing and EHS burden, and avoid duplicating validated tooling elsewhere. The transfer still needs due diligence on condition, documentation, utilities, relocation, reinstallation, verification, approvals and contractual liability.
Why is managed on-site shot peening different?
Managed on-site shot peening reverses the equipment-transfer model. Instead of moving the customer’s machine to SP Center, SP Center brings its equipment, personnel and process know-how to the customer’s plant.
The model creates an alternative between customer-owned in-house processing and conventional subcontracting:
- The physical operation stays close to the production line.
- Inter-site transport, buffer stock and WIP can be reduced.
- Dedicated capacity and specialist process management are combined.
- The customer can avoid direct machine CAPEX and the need to recruit a complete shot peening organisation.
The operational advantage may matter more than the lowest processing price. Automotive, high-volume industrial, very large part and highly integrated programmes are the strongest candidates, provided contract duration and stable demand justify the dedicated cell.
What costs and risks remain when shot peening is outsourced?
Outsourcing introduces transport, packaging, external lead time, WIP, supplier dependency, qualification, planning and communication risk. A credible proposal acknowledges those costs and designs controls around them.
Mitigations can include regular collection routes, packaging standards, frozen planning windows, reserved capacity, local or regional supply, buffer policies, qualified second sources, customer-owned equipment at SP Center, or managed on-site processing. The right model depends on which risk drives the decision.
Supplier governance remains necessary. The customer should monitor quality, capacity, delivery, change notification, continuity and the validity of required approvals. SP Center should receive stable requirements, usable forecasts, timely decisions and controlled drawing or specification changes.
Who should seriously consider outsourcing?
Outsourcing deserves serious evaluation when one or more of the following applies:
- Stable annual spend remains below SP Center’s approximately EUR 800,000 benchmark.
- Volumes fluctuate or the product mix drives frequent changeover.
- The plant has only one machine and no qualified external contingency.
- Process engineering, operator, quality or maintenance competence is difficult to recruit or retain.
- Floor space, compressed air or extraction capacity is constrained.
- The business is restructuring its manufacturing footprint or closing a non-core department.
- Existing peening assets are ageing, underused or increasingly unreliable.
- A customer requires a second source, overflow route or programme-launch capacity.
- The company owns usable equipment but no longer wants to manage the process.
- Transport can be removed through a managed on-site cell.
When can in-house shot peening still be the right choice?
In-house processing can be logical when recurring spend and volume are high, demand is stable over a long programme, compatible part families keep utilisation high, the operation is tightly integrated into production, transport creates unacceptable risk, proprietary process knowledge must stay internal, and the plant already has the engineering, quality, maintenance and EHS capability to sustain the route.
The strongest internal case includes customer support for the qualification, realistic downtime and shift assumptions, funded redundancy, a competence-retention plan and an exit or backup route. A high annual spend alone is not enough.
Comparison of operating models
Assets, location and investment
| Operating model | CAPEX and asset ownership | Machine location | Floor-space and investment effect |
|---|---|---|---|
| Customer-owned in-house | Customer funds and owns the capability. | Customer plant | Highest internal footprint and direct investment. |
| Standard outsourcing at SP Center | SP Center equipment; customer funds part-specific introduction where agreed. | SP Center | Releases or avoids customer process space. |
| Dedicated capacity at SP Center | SP Center and/or programme-specific investment under contract. | SP Center | Customer avoids most internal footprint; commitment may fund reservation. |
| Customer-owned equipment at SP Center | Customer normally retains asset ownership; responsibilities are contractual. | SP Center | Releases customer floor space while retaining asset value. |
| Equipment takeover / asset transfer | Ownership transfers under an individually agreed transaction. | SP Center | Customer exits the asset and internal footprint. |
| SP Center equipment at customer site | SP Center normally owns process equipment; site investment is allocated by contract. | Customer plant | Process stays local without customer machine ownership. |
| Hybrid | Ownership split between customer and SP Center routes. | Both | Selective customer investment with external flexibility. |
Operation, quality and logistics
| Operating model | Personnel and process responsibility | Maintenance, EHS and quality burden | Logistics, lead time and WIP |
|---|---|---|---|
| Customer-owned in-house | Customer staffs, engineers, operates and governs the route. | Predominantly customer; full internal burden. | Lowest inter-site transport; local queue risk remains. |
| Standard outsourcing at SP Center | SP Center executes agreed scope; customer governs requirements and supplier approval. | SP Center for its facility and agreed scope; customer retains supplier governance. | Transport and external WIP apply; lead time is contracted. |
| Dedicated capacity at SP Center | SP Center operates reserved scope with customer-specific controls. | SP Center within scope; programme audits and approvals remain shared. | Planned windows can reduce queue variation; transport remains. |
| Customer-owned equipment at SP Center | SP Center may operate and control daily production; boundaries are contractual. | Maintenance, asset risk, EHS and quality split must be explicit. | Transport remains; customer plant loses internal WIP and department burden. |
| Equipment takeover / asset transfer | SP Center operates acquired assets and supplies service. | SP Center after transfer, except retained customer and design responsibilities. | Similar to external processing; recurring logistics required. |
| SP Center equipment at customer site | SP Center personnel run the specialist cell within site interfaces. | SP Center process scope plus customer site/EHS responsibilities as agreed. | Minimal inter-site transport and WIP; direct line integration possible. |
| Hybrid | Each party runs its approved route; equivalence and allocation are governed jointly. | Duplicate qualification and coordination burden. | Flexible load allocation; two flows must be planned. |
Commercial fit, scalability and risk
| Operating model | Scalability, redundancy and utilisation risk | Contract and investment profile | Best-fit use case |
|---|---|---|---|
| Customer-owned in-house | Customer carries idle capacity and single-point failure unless redundancy is funded. | Long asset life and internal CAPEX. | Stable high utilisation and tight process integration. |
| Standard outsourcing at SP Center | Supplier spreads utilisation; capacity subject to agreed forecast and priorities. | Flexible purchasing; modest introduction cost. | Variable demand, prototypes, serial work, second source. |
| Dedicated capacity at SP Center | Higher assurance under defined reservation; utilisation commitment may apply. | Medium/long contract and forecast discipline. | Strategic programme needing predictable windows or segregation. |
| Customer-owned equipment at SP Center | Existing asset is used; supplier operating resilience depends on agreed support and backup. | Medium/long service and asset-use agreement. | Exit from an internal department without discarding validated assets. |
| Equipment takeover / asset transfer | SP Center carries asset utilisation after transfer; commercial minimums likely. | Long-term agreement and asset due diligence. | Footprint restructuring or permanent process exit. |
| SP Center equipment at customer site | Dedicated capacity; programme carries cell-utilisation risk through contract. | Long-term, stable volume and site-integration commitment. | High volume, heavy parts, low-WIP and integrated flow. |
| Hybrid | Best potential flexibility if both routes are qualified; higher governance complexity. | Selective CAPEX plus external service. | Base load in-house with overflow, backup or specialist external scope. |
Illustrative responsibility matrix for managed on-site shot peening
This matrix is a negotiation starting point, not a universal allocation. The final technical and contractual scope governs.
| Responsibility | Customer | SP Center | To be agreed for each programme |
|---|---|---|---|
| Building and production area | Site owner and access rules | Cell layout input | Area standard, modifications, reinstatement |
| Utilities | Site availability | Consumption data and equipment interface | Capacity upgrades, metering and cost |
| Shot peening machine | Site access and protection | Normally supplies SP Center-owned machine | Insurance, loss, relocation and end-of-term treatment |
| Operators | Site induction and access | Normally supplies trained operators | Shift pattern, absences and local labour interfaces |
| Process engineering | Product authority and requirement approval | Process route and operating support | Proposal authority, validation and change approval |
| Maintenance | Site permits and safe access | Agreed preventive and corrective scope | Major repairs, OEM service and downtime allocation |
| Media | Product restrictions and approval | Day-to-day management where included | Purchase, ownership, segregation and disposal |
| Site EHS rules | Owns and enforces site rules | Complies and trains its personnel | Interface audits, incident response and permits |
| ATEX infrastructure | Provides site information | Provides process and equipment data | Risk assessment, zoning and protection ownership |
| Quality records | Defines flow-down and acceptance | Creates agreed process records | Retention, review, release and data ownership |
| Customer-specific approvals | Owns customer relationship | Supports technical evidence | Submission, approval lead time and cost |
| Production scheduling | Provides demand and priorities | Plans cell operation | Frozen windows, expedites and sequence changes |
| Backup capacity | Defines continuity objective | Proposes available options | Inventory, external backup and recovery SLA |
Make-or-buy decision matrix
Use the matrix as a management workshop, then quantify the shortlisted models with the same assumptions.
| Decision criterion | Outsourcing signal | Hybrid or managed-model signal | In-house case becomes stronger when… |
|---|---|---|---|
| Annual recurring spend | Below about EUR 400,000; often below EUR 800,000 | Near EUR 400,000-800,000 or logistics drive a special model | Stable spend approaches/exceeds EUR 800,000 and full TCO supports it |
| Annual volume and batch pattern | Volatile, seasonal or short batches | Stable base plus peaks | High, stable, repeatable cadence |
| Programme duration | Short or uncertain | Medium/long with review points | Long enough to recover investment and qualification |
| Part families and geometry | Many families or difficult access | Split by family or complexity | Few compatible families |
| Media types | Several types and segregation needs | Selected internal medium plus external specialists | One or few compatible media |
| Utilisation and shifts | Low or uncertain utilisation | Base-load internal, peaks external; or dedicated on-site cell | High good-part utilisation across funded shifts |
| Labour and competence | Scarce specialists or fragile single-person coverage | Customer retains governance; SP Center provides operation | Competent multi-shift team already exists and can be retained |
| Quality and approval | Supplier route can be qualified faster | Different approved routes for defined scopes | Internal source approval is supported and maintainable |
| Maintenance | Limited specialist capability or spares | External coverage during internal maintenance | Strong maintenance, automation and OEM support exist |
| EHS and ATEX | New dust/noise/explosion burden is undesirable | On-site responsibilities can be allocated | Site already has suitable controls and competence |
| Floor space and utilities | Constrained space, air or extraction | Customer equipment can move to SP Center; SP Center cell can use available site space | Suitable area and utilities have low opportunity cost |
| Redundancy and contingency | External specialist can provide approved continuity | Two qualified routes are maintained | Customer can fund a second machine or qualified backup |
| Logistics | Parts are economical to transport | Dedicated logistics or equipment transfer reduces burden; on-site for heavy parts | Transport is technically or economically unacceptable |
| Customer approvals | Supplier approvals are available | Approval can be split or transferred | Customer supports the internal route and changes |
| CAPEX and opportunity cost | Capital has higher-value uses elsewhere | Investment shared or attached to contract | Capital is available and the internal return is superior |
| Exit risk | Demand or programme may end | Contract contains step-down and asset provisions | Asset has credible reuse and residual value |
Illustrative European business case
This example is a transparent scenario, not an industry cost average or a quotation. It shows why direct cycle cost and supplier spend cannot be compared without the complete operating system.
Assumptions: three compatible part families; 120,000 parts per year; two planned shifts; five-year programme; existing external shot peening spend of EUR 620,000 per year; recurring external packaging and logistics of EUR 55,000; supplier management of EUR 25,000. The apparent internal cycle model estimates EUR 290,000 of direct labour, media and utilities.
| Annual internal cost element | Illustrative assumption | Why it belongs in TCO |
|---|---|---|
| Direct labour, media and utilities | EUR 290,000 | The visible cycle-cost model |
| Equipment and automation depreciation | EUR 160,000 | Machine, handling, tooling and controls over assumed life |
| Maintenance and critical spares | EUR 70,000 | Preventive work, wear items, service and recovery stock |
| Process engineering, quality and EHS | EUR 130,000 | Specialist support beyond direct operators |
| Facility, extraction, compressed air infrastructure and space | EUR 60,000 | Internal services and opportunity cost |
| Qualification, calibration, records and audits | EUR 45,000 | Launch and continuing evidence, annualised for the example |
| Changeovers, downtime and unused capacity | EUR 95,000 | Difference between theoretical hours and accepted output |
| Contingency and qualified backup provision | EUR 30,000 | Business-continuity allowance |
| Illustrative full internal TCO | EUR 880,000 | Sum of stated assumptions |
In the same example, the external route totals EUR 700,000: EUR 620,000 processing, EUR 55,000 packaging/logistics and EUR 25,000 supplier management. Outsourcing is therefore EUR 180,000 lower under these assumptions, even though the internal direct cycle model appears EUR 330,000 lower than supplier processing spend.
The result could reverse if volume and utilisation rise, transport becomes prohibitive, the programme lasts longer, suitable infrastructure already exists or a customer-site managed cell removes logistics. Management should therefore test base, downside and upside demand rather than copy the illustrative figures.
Frequently asked questions about shot peening outsourcing
When does in-house shot peening become economical?
SP Center normally recommends a serious internal TCO study when stable recurring annual shot peening spend approaches approximately EUR 800,000. This is a practical management benchmark, not a universal break-even threshold, and the final result depends on utilisation, programme life, complexity, staffing, approvals and continuity.
Is outsourcing shot peening cheaper?
It can be cheaper when internal utilisation is low or variable and the full costs of specialist staff, maintenance, media management, quality, EHS, floor space and backup are included. Outsourcing also adds logistics, packaging, supplier management and external lead time, which must be priced in the same model.
How much annual shot peening spend justifies buying a machine?
Machine purchase should not be justified by spend alone. SP Center uses about EUR 800,000 of stable recurring annual spend as the point to begin a full internal TCO analysis; no purchase decision should follow until the complete capability and downside scenarios are costed.
What are the hidden costs of in-house shot peening?
Commonly missed costs include utilities, extraction, acoustic controls, fixtures, masking, media classification, specialist staffing, qualification, calibration, maintenance, spares, downtime, unused capacity, customer approvals, EHS and a backup route.
Does shot peening require ATEX?
Not automatically. ATEX applicability depends on the workpiece, media, generated dust, extraction system and site risk assessment, and may require zoning or explosion protection only where a potentially explosive atmosphere can occur.
Does shot peening require Nadcap?
Not for every customer or industry. Nadcap applies when the aerospace contract, customer approval or source requirement invokes the relevant accreditation and scope; the exact processor site and process scope must be verified.
What personnel are needed to run shot peening in-house?
A sustainable route normally needs process engineering, trained operators and substitutes, quality support, maintenance and automation competence, EHS support and calibration or metrology coverage. Relying on one experienced person creates a continuity risk.
Can a shot peening machine be transferred to an outsourcing supplier?
Yes, for a suitable project and subject to equipment condition, relocation feasibility, utilities, qualification, approvals and contract. SP Center can evaluate customer-owned equipment operated at its facility or an asset-transfer model.
Can SP Center operate customer-owned shot peening equipment?
SP Center can evaluate operating customer-owned equipment at the SP Center facility. Ownership, installation, maintenance, quality, insurance, legal and asset responsibilities are allocated according to the agreed technical and contractual scope.
Can SP Center install its own machine at the customer’s factory?
SP Center can evaluate managed on-site shot peening for selected high-volume, stable and long-term programmes. Feasibility depends on infrastructure, utilities, EHS, staffing, qualification, utilisation and contract duration.
Can SP Center provide shot peening operators at the customer’s site?
Operator provision can form part of a managed on-site model when the programme supports a defined long-term scope. Shift coverage, supervision, site induction, labour interfaces and contingency must be agreed.
Can outsourced shot peening be integrated into the customer’s production flow?
Yes. Options include scheduled logistics, reserved capacity, dedicated cells at SP Center and SP Center equipment with SP Center personnel at the customer’s site. The on-site model provides the closest physical integration and lowest inter-site WIP.
What is managed on-site shot peening?
Managed on-site shot peening means SP Center places and operates specialist shot peening capacity at the customer’s facility under an agreed responsibility model. The customer keeps the operation close to its line without owning and staffing the complete capability in the traditional way.
What is the difference between standard outsourcing and dedicated capacity?
Standard outsourcing uses shared specialist capacity against an agreed order and schedule. Dedicated or reserved capacity adds programme-specific tooling, windows, controls or commitments and normally requires stronger forecasting and a longer commercial basis.
What is a hybrid shot peening outsourcing model?
A hybrid model keeps approved base capacity in-house and uses SP Center for defined parts, peaks, maintenance, specialist geometries or backup. Both routes must be qualified and governed; a nominally similar process is not automatically interchangeable.
Not sure whether to keep shot peening in-house?
Send SP Center:
- current annual internal and external processing cost;
- annual volumes, batch pattern and expected programme duration;
- part families, drawings, material condition and process specifications;
- media, intensity, coverage and evidence requirements;
- existing machines, tooling, programs and known constraints;
- customer approvals, PPAP, FAI, Nadcap or source requirements where applicable;
- logistics, lead-time, WIP and continuity objectives.
SP Center can review standard outsourcing, dedicated capacity, a hybrid route, customer-owned equipment at SP Center, an equipment-transfer arrangement, or SP Center equipment and personnel at the customer site.