Early planning and identification of the skills and resources required for value testing is key to the process, as is maintaining good communications throughout. The process should have a clear plan agreed from the outset, including a timetable that allows adequate time for iteration, clarification and negotiation. It may take anything from nine months to two years to undertake the exercise. Departments should be involved early on in the process, and all appropriate guidance and legislation relating to employee rights must be fully complied with.