What a probity plan sets out
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A probity plan is a written document, prepared before a major procurement or decision process begins, that sets out exactly how fairness, transparency and proper record keeping will be maintained throughout. It acts as an agreed reference point that everyone involved can be measured against once the process is actually underway.
A typical plan names who is responsible for managing conflicts of interest, sets out how communication with bidders will be controlled and recorded, and defines the evaluation criteria that will be applied consistently to every submission received. Agreeing these details in advance removes much of the room for later dispute or ambiguity.
Having a documented plan also protects the organisation if a decision is later challenged, since it demonstrates the process was designed deliberately for fairness rather than improvised as it went along. A plan followed consistently is usually far more persuasive than any explanation offered only after the fact.