The managers are fully responsible for the success of the implementation. It is up to them to make the decisions and enforce the necessary procedures and policies to accomplish the goals.  

End-Users

End-Users can provide input from the front-line to ensure that the processes work on a day-to-day basis.

Customers:

How can we serve them better? What will encourage their purchasing decisions in our favor?

IT Staff:

Integral part of design and implementation of system.

System Consultant:

Brings an objective, experienced, professional oversight to the project.