The principal requirement is that job experts should have knowledge of job activities performed by the persons who are to be tested. That knowledge may be obtained through experience, e.g. working as an incumbent or supervisor, or through training, e.g. received in apprenticeship, technical training or engineering school.

A second requirement is that job experts should be cooperative persons who want to be there. Persons who are unwilling participants may disrupt or impair the success of the process. Intelligent and agreeable persons usually contribute the most to the process.

A third requirement is to achieve diversity in the composition of the expert group. This means that age, race, gender, and national origin should be addressed in making the experts as diverse as possible. This will also help the credibility of the process.

Union officials may participate or observe the process, but should meet the criteria shown above if they are to contribute to the process.

All participants should be apprised of the importance of their activities and of the need for confidentiality in order to ensure fairness and objectivity and protect the security of the tests.