Suitable criteria exhibit all of the following characteristics:
- Relevance. Criteria are relevant to the subject matter.
- Objectivity. Criteria are free from bias.
- Measurability. Criteria permit reasonably consistent measurements, qualitative or quantitative, of subject matter.
- Completeness. Criteria are complete when subject matter prepared in accordance with them does not omit relevant factors that could reasonably be expected to affect decisions of the intended users made on the basis of that subject matter.
The relative importance of each characteristic to a particular engagement is a matter of professional judgment.