The design of a service for each new business functionality is a challenging balancing act in order to ensure not only that the functional requirements are met but also that the performance targets are achieved. A development manager primarily has to keep the following three factors under control:

• Functionality with the required quality
• Resources, i.e. staff, technologies and available finances
• Timetable

A balance must be maintained between all three factors so they can be adapted to changing business requirements on a dynamic basis.