When a supplier misses a fill-rate target, a buyer can turn the conversation into a demand for recovery, discount, or penalty. That may feel efficient, but the first visible problem is often only the symptom. If you negotiate against the symptom, you can spend value fixing the wrong thing.
The 5 Whys lesson from the ABN curriculum is a simple discipline for slowing that reaction down. Ask why, listen to the answer, then ask again until the actual source of the issue is clear enough to solve.
Start With the Symptom
Suppose a vendor’s fill rate drops from 95% to 78%. The surface issue is missed orders, but the useful question is what created the miss. Are they short on labor? Behind in production? Delayed by a quality-control change? Waiting on a component from their own supplier?
Each answer should move the discussion one layer deeper. The point is not to interrogate your counterpart. The point is to separate the business problem from the first explanation you were handed.
Protect The Relationship While You Diagnose
The tone matters. “Why did this happen?” can sound like blame if it comes out sharp. “Help me understand what is driving this” usually keeps the conversation more productive. You are signaling that you want to solve the problem with them, not score a point against them.
That distinction is valuable in B2B negotiations because many deals are part of ongoing relationships. A better diagnosis can preserve trust while still holding the other side accountable.
Negotiate The Real Fix
Once the root cause is visible, the trade may change. A fill-rate issue caused by one defective SKU is different from a capacity issue across the vendor’s operation. One might call for packaging changes or SKU-specific inspection. The other might require allocation, phased orders, or a revised service commitment.
Practical takeaway: Before you negotiate the fix, ask enough questions to know whether you are solving the symptom or the source.
Want the framework behind this? Download the free 5 Laws of Negotiation ebook: 5laws.negotiationsacademy.com
