Decision taken in light of the cross project work load can be entered into the system within the project office as well as being communicated verbally and on paper. These systems are expensive and more complex to use. The tendency is for a small number of enthusiasts to enter data on behalf of themselves and other, less computer literate, users. Any capable planner can add in a new project to the organisation-wide programme. This can be done by accessing a library of typical projects or by creating one from scratch.
Plans are simple but loaded with resources.
Consolidation is immediate and automatic via the network and multi-user software. Each terminal can display a project, summaries of groups of projects and demand for each resource. Achievement measurement is normally dealt with by a manual system with administrative staff employed to enter details to the multi-project planning system. Such systems involve a 'big bang' approach and implementation is a significant project in itself. Access to such a system must be controlled so that authority to alter the parts of the model rests with appropriate people.