Dealing with Complex Projects Using PMLC Models.

A member of your project team is a systems analyst who is old-fashioned and just cannot adjust to Adaptive Project Framework (APF). Her problem is that the client has decision-making authority over the direction that your software development project is taking and that the clients, shall we say, technically challenged. How would you justify the most appropriate PMLC model to be used to satisfy the needs of the client and the systems analyst?