An immediate requirement within the aerospace industry appears to be the development of a practical system for the evaluation and control of complex projects. No amount of qualitative evaluation will present management with the answer to the problem of making complex decisions. The Generalised System for Project Control and Evaluation presents an approach towards evaluation of quantitative indices of “value” and “cost effectiveness” that can be optimised, possibly by operational research methods, to produce information that can be used by management in the making of realistic decisions.