Exceptions
Agreed before anything goes wrong, not during.
Every one of these is a normal week in purchasing. The difference between a manageable week and an expensive one is whether the response was decided in advance.
Why the "who decides" column exists
Most purchasing disputes are not really about the defect or the delay. They are about someone having made a call they were not authorised to make, or nobody having made one at all while the container sat.
Things we decide
Operational calls with no commercial consequence to you: which day the inspection happens, how a count discrepancy is evidenced, when to escalate to a second contact.
Things you decide
Anything that costs money or changes what you receive: accepting a revised date, approving a discount instead of rework, absorbing a price increase, switching supplier. We give you a recommendation and the reasoning. The call is yours.
Things nobody should decide alone
Quality limits and payment terms belong in writing before the first order. If they are still being negotiated when a problem appears, the problem gets solved by whoever is more stubborn rather than by what was agreed.