The term key users will be used in connection with the introduction of business software ( eg . As ERP systems ) . The key user himself is an employee of the company , which introduces the business software . The key users is that users who specializes in his field on the used there software and corresponding software modules . A key user supports the extension and depth of integration and represents the professional interests of the department in the project team . It also acts as a contact for colleagues in your own department , the ERP vendor and the project manager . A key user can autonomously conduct necessary training for his colleagues .