A software-cost database for aerospace software development
National Aerospace Laboratory NLR
Cost estimation of software development and control of the cost during the development are difficult due to the lack of applicable cost figures from previous projects, and consequently due to the lack of an accurate cost estimation and management method. In order to improve this situation, a user-friendly method for the collection, storage and retrieval of software-cost data has been developed, with emphasis on aerospace software projects. Data is and will be collected regarding 47 welldefined cost factors, divided in 8 classes. It is felt that the clear definition of these cost factors will be of main importance for the applicability of the collected data. When suitable data is available from completed projects, the impact of these factors on the software development cost can be estimated. This will lead to a more reliable cost estimation and cost management method. The paper describes the cost estimation method that will be calibrated by means of the collected data, the implemented data collection and retrieval system, called a software-cost database, and the use of this system as management tool during running projects. For some projects, the cost database is already in use. Paper presented at the 44th symposium of AGARD avionics panel on "Software for Avionics", the Hague, the Netherlands, September 6-10, 1982.
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(c) 1982 National Aerospace Laboratory NLR