As a program evaluator, what are some of the major considerations that must be taken into account when formulating evaluation questions?

Evaluation questions, similar to research questions in academic research projects, guide the methods and tools used to collect data to understand the problem under investigation. Evaluation questions may seem intuitive, and thus be quickly developed to get to the more detailed program planning. But, without well-developed, relevant, and accurate evaluation questions, projects can move around a problem without addressing the most critical issue. As a program evaluator, what are some of the major considerations that must be taken into account when formulating evaluation questions?