Some changes may require significant work and outlay to implement. For example, a change may mean the private party has to alter the project assets used to provide services. There must be some means of determining how the change is prioritised with other work carried out by the private party. A variety of methods can be used to prioritise appropriately, depending on the nature of the change. Possible methods include:
• setting a time limit for implementing the change;
• specifying that it be given priority over certain other responsibilities of the private party; and
• providing financial incentives for implementing the change.