Most AI vendor evaluations spend their energy on the demo. The output looks good, the integration looks easy, and the support terms get skimmed at the end of the contract because they feel like boilerplate. That is the wrong order. The question that decides whether a purchase is workable is not what the tool does on a good day, it is who is accountable on a bad one.
The build versus buy literature is blunt about this. HatchWorks argues that the failure mode is not picking the wrong tool, it is picking something the organization cannot operate, and that buyers should decide what must be owned versus orchestrated before they scan the market at all the build vs buy framework. A support contract is the part of "buy" that transfers operational risk back to the vendor. If it is vague, you bought the tool and kept the risk.
A useful reframe: you are not buying response time. You are buying a decision right. When an AI system produces a wrong, harmful or out-of-policy output, someone has to decide whether to roll back the model, disable an agent, notify customers, or change a prompt. The support contract should say who makes that call, how fast, and what evidence you get afterward. KPMG's survey work notes that risk management and control sit among the core forces in the buy decision, which makes control a contract term rather than a feature toggle the KPMG analysis.



