13 Joint procurement is always difficult, especially where purchasers have divergent objectives. It is better to let one purchaser take the lead with proper arrangements for information flow and reporting to the other. This requires a clear agreement, embodied in the contractual arrangements as well as in a memorandum of understanding, as to roles and responsibilities.
14 Incentives to deliver should pull the same way for both parties to a project: for example, financial and timetable incentives should be mutually supportive: and the parties should agree common objectives and "must-haves" at the outset, as these will influence future behaviour.