Business context
Manufacturing businesses often grow around the suppliers, facilities and technical partners that helped them win their first important programmes. Concentration can therefore be rational. A proven supplier understands the quality standard, responds quickly and reduces coordination cost. The problem begins when operational convenience becomes strategic dependence without an explicit management decision.
Supplier concentration affects more than procurement continuity. It influences the promises a company can make to customers, its ability to negotiate price and lead time, the speed at which it can enter new segments, and the credibility of its growth plan. When one material source, production facility or technical process supports a large share of revenue, a disruption can become a commercial event long before it becomes an insurance event.
The core management problem
The central issue is not whether concentration exists. Most businesses have some form of concentration. The issue is whether management understands the dependency, has assigned an owner and has decided how much exposure is acceptable.
A supply-chain team may know that a material comes from one source, while the sales team may still commit to aggressive growth without understanding the capacity constraint. Finance may see the revenue concentration, but not the operational dependency underneath it. Headquarters may assume that an alternative supplier can be activated quickly, while the local team knows that qualification could take months. Each function holds a different part of the truth.
Without one integrated view, the company can simultaneously approve growth, increase customer commitments and deepen a dependency it has never formally accepted.
Common mistakes
The first mistake is treating concentration as a binary problem. A business does not become resilient simply by adding a second supplier to a list. The alternative must be technically qualified, commercially viable, operationally available and capable of meeting the customer’s approval requirements.
The second mistake is measuring only purchase value. A low-spend component can stop a high-value programme. Management should look at revenue dependency, customer commitments, qualification time, switching cost and recovery time—not only the annual procurement amount.
The third mistake is assuming that the supply-chain team owns the entire issue. Commercial leaders create demand, make delivery commitments and shape the customer portfolio. They therefore share responsibility for the exposure.
The fourth mistake is waiting for disruption before discussing ownership. During a crisis, organisations lose time deciding who can approve an alternative source, which customer should be prioritised and what commercial concessions are acceptable.
The Patrick Lee Business Lens
The Growth × Manufacturing × Risk framework creates a more complete discussion.
The growth question is: which customers, programmes and markets depend on this source, and how much future revenue assumes its continued availability?
The manufacturing question is: what makes the current source difficult to replace? The answer may involve tooling, technical know-how, customer certification, material formulation, capacity, quality stability or logistics.
The risk question is: which dependency could prevent the commercial plan from being delivered, who owns that exposure, and what action would reduce it?
These three questions turn concentration from a procurement statistic into a management decision.
A practical review process
Start by identifying the small number of suppliers, facilities, materials, people and approval points that support the largest customer commitments. Map each dependency against related revenue, affected customers, switching time and current alternative.
Next, distinguish between nominal alternatives and executable alternatives. A supplier that exists in the market but has not passed testing, customer approval or capacity review should not be treated as ready.
Then assign a business owner. Procurement may lead supplier development, but sales should own customer communication, operations should own continuity assumptions and management should decide the acceptable exposure.
Finally, prioritise action. Not every concentration requires immediate duplication. Some dependencies can be accepted, some need monitoring, and some justify qualification, inventory, contract, capacity or portfolio action. The purpose is disciplined choice, not the elimination of every dependency.
Management implication
Supplier concentration deserves a commercial conversation because growth and dependency are often created together. A strong business does not hide concentration behind current performance. It makes the dependency visible, tests whether the growth plan can survive it and decides deliberately what to do next.
The objective is not maximum redundancy. It is credible growth supported by operational reality and explicit risk ownership.
The discipline also improves strategic conversations with customers. When management understands its dependencies, it can make more realistic commitments, prioritise qualification investment and explain resilience actions without creating false certainty.