Supplier Numbers: Balancing Risk and Efficiency

More suppliers or fewer?

Few questions in sourcing get argued as convincingly from both sides as this one: should you increase supplier numbers to diversify risk, or reduce them to drive efficiency?

Since COVID, port closures, tariff swings and the push to "China plus one", the loudest advice has been to diversify. Add suppliers, add countries, add ports. Spread the risk. It sounds prudent, and makes investors happy - until they see the impact on profitability.

Diversification can come at a cost. Every supplier you add dilutes your volume, your attention and your leverage. Past a certain point, the extra suppliers that were meant to make you more resilient start making you weaker, slower and more expensive than the competitors you are up against every day.

The real task is not choosing between risk and efficiency. It is finding the balance point that fits your business. In my experience, that point sits much closer to "fewer" than most people now assume, particularly for small and mid-sized importers.

The case for more suppliers

The argument for diversification is simple and real. Too few suppliers, and a single local disruption can stop your whole operation.

Sometimes it happens. A factory fire. A sudden power rationing order across a province. A port congested for weeks. A key owner who falls out with a partner or simply decides your order is no longer worth the trouble. If all your volume for a category sits with one factory, or exits through one port, any one of these events becomes your problem overnight.

More suppliers can also give you:

• Price tension. Factories quote more sharply when they know you have alternatives.
• Capability range. Different factories bring different strengths in materials, processes and price points.
• Capacity headroom. A second source can absorb peaks the first cannot handle.
• Geographic options. Spreading production across regions or countries reduces exposure to localised issues.

None of this is wrong. The mistake is assuming that if some diversification is good, more must be better.

The hidden cost of spreading too thin

Too many suppliers, and you lose volume discounts, consistency and relationship leverage. Those losses are quieter than a factory fire, but they are certain, and they compound every single season.

You lose volume leverage. Split 100,000 units across four factories and each sees 25,000. You are no longer an important customer to anyone. Your pricing reflects that, and so does your place in the production queue when capacity gets tight.

You lose consistency. Every factory interprets a specification slightly differently. Colour, fit, finish, packaging and tolerances drift. Your customers notice, and your returns and complaints data will show it before your team does.

You lose relationship strength. In China and across Asia, the relationship is often what gets you through a crisis. A factory that values your business will juggle its schedule, call you early about a problem and find materials when others cannot. A factory that sees you as a small, occasional buyer will not. Ironically, this means a thin supply base can be less resilient in a disruption, not more.

Your costs rise in places you do not see on the FOB price. More factories mean more audits, more inspections, more samples, more travel, more compliance documentation, more supplier onboarding and more management time. Freight gets less efficient too. Smaller shipments from more ports mean more LCL, less container consolidation and higher landed cost per unit.

Your team spreads thin as well. A sourcing manager managing too many factories for a category does not manage any of them well. Problems get found later, and fixed more slowly.

This is the core point: diversification reduces the probability of one big disruption hurting you, but over-diversification creates a certainty of running a less efficient supply chain than your competitors.

Volume and risk appetite decide the answer

There is no universal right number of suppliers. The answer is driven mainly by two things: your overall volume and your appetite for risk.

Volume sets how many suppliers you can afford. A large retailer buying millions of units in a category can run three or four strong suppliers, across two countries, and still be a meaningful customer to every one of them. Each relationship has enough volume to earn good pricing, priority and attention.

A business buying a fraction of that cannot. The lower your volume, the more you should focus on minimising the number of suppliers and ports of exit. Otherwise your supply chain becomes fragmented, and your costs end up higher than competitors running a more focused supply base. You become a small customer everywhere and an important customer nowhere.

Risk appetite sets how much efficiency you are willing to give up. Some businesses genuinely cannot afford a stock-out. A medical supplier, or a retailer whose biggest category lands in one peak season, may rationally pay a premium for a second source. Others can tolerate a disruption, ride it out with safety stock or substitute products, and recover.

The honest trade-off for most lower-volume businesses is this. Yes, a focused supply base does mean a higher risk of being hit by a major disruption. But that is better than a 100% probability of running an inefficient, fragmented supply chain against competitors who are not. A possible bad event is easier to plan for than a guaranteed cost disadvantage you carry every day.

Practical ways to balance risk and reliance

Focusing your supply base does not mean ignoring risk. It means managing risk in ways that do not destroy your efficiency.

1. Diversify by category, not within every category. Rather than splitting each product line across several factories, keep each category concentrated with one strong supplier, and spread your categories across different suppliers and regions. Your overall exposure is diversified while each relationship keeps its volume.
2. Use a primary plus a qualified backup. Give 80% or more of a category to your main supplier and place small, regular orders with a second factory that has been audited and sampled. The backup stays warm, knows your standards and can scale up if needed, without diluting your main relationship.
3. Rank your risk. Not every product deserves the same protection. Put your dual sourcing effort into high-volume, high-margin or hard-to-replace items. Accept concentration where a disruption would be inconvenient rather than critical.
4. Know your supplier's risk, not just their price. Understand their financial health, their own key material suppliers, their location and their reliance on you. A single supplier you know deeply is often safer than three you barely know.
5. Hold buffers where they matter. Safety stock on critical lines, and realistic lead times, can carry you through most disruptions at a lower cost than permanently fragmenting your supply base.
6. Consolidate ports and logistics. Fewer ports of exit mean fuller containers, simpler logistics and lower landed cost. Diversify ports only when your volume can genuinely support it.
7. Review the balance regularly. As your volume grows, the point at which a second or third supplier makes sense will move. What was over-diversification at 20 containers a year may be the right move at 200.

Finding your balance point

Diversification reduces risk, but spreading your suppliers too thin reduces resilience and efficiency and increases cost. The goal is not the most suppliers or the fewest. It is the right number for your volume and your tolerance for risk.

For most small and mid-sized businesses sourcing from Asia, that means a focused supply base built on strong, well-understood relationships, backed by targeted risk measures where they matter most. Accept a manageable level of risk in exchange for a supply chain that is cost-competitive every day.

If you are unsure where your own balance point sits, start by mapping your spend by supplier, category and port. The fragmentation is often obvious once it is on one page.

About Supply In Sight

Supply In Sight helps brands and retailers get the balance right on their supply from Asia. We review your supply base, map where your real risks and hidden costs sit, and help you build a supplier strategy that fits your volume and your appetite for risk. Supply In Sight draws on more than 30 years in sourcing and supply chain, including 20 years working in Asia, much of it based in China.

If you would like a clear view of whether your supply base is too concentrated, too fragmented or about right, visit www.supplyinsight.net to start the conversation.