Supplier developmentsystematically strengthening suppliers and improving performance

Distinction from supplier management and supplier evaluation

Supplier management steers the entire portfolio across the whole business relationship – from risk-based selection through contract negotiation to risk monitoring. Regular supplier evaluation provides the data basis, e.g. metrics on on-time delivery, quality and price level. Supplier development takes up these findings and derives concrete improvement projects from them, usually bilaterally with individual suppliers. In practice this means: the evaluation indicates who should be developed; development ensures that the evaluation deficits are actually remedied. Without development measures, the evaluation risks degenerating into mere data collection whose results no one consistently addresses.

When supplier development is worthwhile

An engagement rarely pays off across the board, but rather according to investment criteria. Procurement typically prioritises A-suppliers with high purchase volumes, single sources for critical components, suppliers with strategic technology competencies and suppliers whose replacement would be costly or impossible due to tooling investments, approvals or low market density. Even with recurring quality problems or long lead times, development can be more economical than switching. Conversely: for interchangeable C-parts, market cleansing through tender-based competitions is frequently more efficient. The decision belongs in a structured risk analysis that weighs substitutability, cost pressure and risk potential.

The typical process in four steps

First, procurement together with quality analyses the evaluation results and identifies the causes of weak performance – often on site, e.g. through audits or process walk-throughs. This is followed by the target agreement with concrete, measurable goals and a roadmap. The third step involves implementation through joint projects with clearly assigned owners and deadlines, ideally anchored via an approval workflow for changes and a documented reporting structure. Finally, the impact is reviewed regularly and fed into the next evaluation round. In practice, a relevant supplier typically goes through this cycle once or twice a year; complex projects can run considerably longer.

Proven instruments

The toolkit extends far beyond mere demand catalogues. Frequently used building blocks are:

• Process audits and joint value stream analyses to reduce lead times and improve PO cycle time
• Joint cost reduction projects, e.g. on material consumption, scrap or logistics concepts, with an agreed benefit split
• Support in procurement quality management including measurement capability evidence such as Gage R&R and effectively run complaint management
• Technology transfer and early supplier involvement, e.g. joint design sprints for design optimisation before start of production
• Digitalisation support, e.g. for electronic ordering processes, electronic tendering and coordinated interfaces

Requirement profiles and first sample submission as a starting point

Especially for new parts, development does not begin only in series production. A clearly structured specification and a disciplined first sample submission (EMPB) with documented inspection steps lay the foundation for later stability. Many defect patterns in series production can be traced back to incomplete requirements or premature release for serial production. Anyone who demands a clean approval workflow and defined material traceability from the outset significantly reduces later development needs. Changes in series production should be governed by a clear change order clause so that a distinction is made between mandatory and optional changes and their cost consequences.

Core metrics of supplier reporting

The classic basis is formed by on-time delivery and schedule adherence, quality metrics such as defect rates in PPM and the complaint rate including processing time in complaint management. In addition, ordering processes show their effect in the PO cycle time, i.e. the time from order placement to confirmation or delivery. On the buyer's side, data quality metrics such as data quality KPIs reveal whether master data, price paths and classifications allow reliable evaluations at all. What matters is less the quantity of metrics than their consequence: every figure must be assigned to a clear target path and discussed regularly with the supplier.

Programme level rather than individual supplier level

In addition to supplier metrics, the development programme itself should also be measured. Common figures in practice are the number of active development projects, the share of developed suppliers in total purchase volume, the target achievement rate of project measures and the average time until a demonstrable improvement in a metric. Those who work transparently here can demonstrate to management that the deployment of engineering and procurement resources translates into deliverable performance – and at the same time identify programmes that generate only activity but no contribution to results.

Dependence, effort and knowledge leakage

The biggest structural risk lies in investing development resources in suppliers who then barely improve in performance or are even phased out. Therefore: carry out a risk analysis before every programme and examine alternatives such as dual sourcing. Furthermore, intensive know-how transfer – e.g. on processes or design principles – can weaken the negotiating position if protection is lacking in contracts. Confidentiality, ownership rights to jointly developed results and clear warranty agreements should therefore be included in the agreements from the outset. The cost structure also deserves attention: additional charges such as an energy price surcharge must be disclosed in a comprehensible manner and not accepted as a blanket matter.

Compliance and fair design

When the selection and management of suppliers follows uniform, documented criteria, a sound basis for governance requirements is created at the same time. Audits, training and improvement measures should be documented in a traceable manner, as should material traceability for safety-relevant parts. In an international environment, trade law details must also be observed, e.g. correctly agreed Incoterms DPU or other delivery terms as well as preference certificates such as the EUR.1 certificate for preferential origins. Since legal and tax matters are highly case-dependent, specific provisions should always be professionally reviewed. Distinguishing between voluntary cooperation and a binding instruction also avoids trouble.

Anchoring in commodity group strategy and life cycle

Which suppliers are developed follows logically from the commodity group structure and the positioning of each category: strategic commodity groups tolerate high investment in partnerships, whereas interchangeable standard parts rather call for intensive competition management. This is closely interlinked with product life cycle management: in the development phase of new products, early supplier involvement pays off, while in the phase-out phase material disposition and stock security tend to take priority. Global footprints also play a role: with offshoring, building reliable quality typically takes longer, so planned development effort there is particularly important. Transport logistics aspects such as suitable container types and reliable dates at ramping volumes should also be addressed early.

Digital support and looking ahead

Digital tools make programmes scalable: evaluation systems with consolidated data quality KPIs, platforms for electronic tendering, shared action plans and structured approval workflows reduce manual coordination effort. A systematically maintained technology radar also helps to detect technological leaps at suppliers early and to direct development capacity to where it creates strategic added value. Compared with elaborate ratings, what remains decisive is that data quality is right – poor master data render any metric worthless. Carefully designed systems relieve buyers of routine work and create space for what software cannot replace: the personal conversation at eye level with the supplier.