Software Cost Estimation and Sizing Methods: Issues and Guidelines
Abstract
Estimating the size and cost of software is a risky business. When software is a crucial component in numerous space weapon aircraft, and information technology projects critical to operations as it often is for the Air Force, accurate estimates of software costs are essential. Because software size is usually the most influential factor in determining software costs, good estimates of size are critical to good cost estimation. Rather than seeking the perfect method for estimating size and cost exactly a more realistic approach to improving estimation is to reduce the risks (that is, to anticipate likely problems) associated with improper sizing and costing of software. Consequently the goal of this report is to aid experienced cost analysts in understanding the sources of uncertainty and risk in sizing and costing software, and to provide insight into mitigating the risks when making choices about different sizing and costing opt ions. We pay particular attention to the early stages of a project when many of the factors needed to support estimation (such as the particulars of each system requirement) may be unknown or uncertain.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2005
- Accession Number
- ADA439077
Entities
People
- Felicia Wu
- Rosalind Lewis
- Shari L. Pfleeger
Organizations
- RAND Corporation