Where there are a number of solutions to service requirements, the delivery of each may impact differently on public interest. These differences will need to be reflected and evaluated in the ongoing assessments of the project delivery options throughout the development of the business case.
The project service requirements defined within the output specification should be described in terms of demand, target population/clients, boundaries, constraints, etc. Measurement of the effectiveness of a solution in meeting the service requirement will be achieved by the development of measurement tools such as key performance indicators, balanced scorecards and performance measures.