According to the PMI Guide to Business Analysis, one of the best strategies to define appropriate

acceptance criteria is to clearly define the performance measures and targets for the solution, such

as accuracy, reliability, availability, efficiency, etc. These measures and targets help to evaluate how

well the solution meets the stakeholder needs and expectations, and how it contributes to the

business value. In this case, since the operations manager is concerned about the accuracy of the

new measurement system, a good strategy would be to clearly define the maximum acceptable error

rate for the new system, which would indicate how accurate the system should be in order to be

accepted by the stakeholder. Quantifying the risks associated with measurement errors, asking for a

formal acceptance of requirements documents, or planning a training session for the new system are

not effective strategies to define appropriate acceptance criteria, as they do not specify how the

performance of the solution will be measured or evaluated. Reference: PMI Guide to Business

Analysis, page 316-317.