Shari Lawrence Pfleeger

Why have the costs of acquiring space systems been so high? What are the sources of the problem? To answer these questions, RAND undertook an extensive study of two space systems - the Space Based Infrared SystemHigh (SBIRS) and the Global Positioning System (GPS). This title analyzes the reason for the comparatively high growth in the cost of space systems by means of an in-depth study of two systems: SBIRS-High and GPS.

Recommends an approach to improving the utility and accuracy of software cost estimates by exposing uncertainty (in understanding the project) and reducing the risks associated with developing the estimates. The approach focuses on characteristics of the estimation process (such as which methods and models are most appropriate for a given situation) and the nature of the data used (such as software size), describing symptoms and warning signs of risk in each factor, and risk-mitigation strategies.

.