Production consultants are usually individuals or are part of consulting company, with more years of experience in one or more production departments and having management positions in these departments. And then they apply this insight to other companies as a service by presenting recommendations and set a schedule for implementing improvements.
A production consultant may work with several clients simultaneously, spending only a few hours per week on each. To solve a more difficult problem, they may be brought in for three months on a full-time basis. It all depends on the goal of the company and the challenge it is trying to solve.
A consultant’s job is to solve a client’s most important challenge and then prioritize what is most important one, and so on.