DEVELOPMENT OF EQUATIONS FOR ESTIMATING THE COSTS OF COMPUTER PROGRAM PRODUCTION
SYSTEM DEVELOPMENT CORP SANTA MONICA CA
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The report summarizes System Development Corporation SDC Technical Memorandum TM-2712 AD-631 259. Additional sets of equations are given. Each set contains four equations each equation shows how to form an estimate for one of the cost measures--number of man months, computer hours, new machine language instructions, months elapsed--by combining numerical values for selected factors that influence these costs. This report reviews the development of these equations including the application of statistical methods such as correlation and multivariate regression to experience data that characterize 74 computer programming efforts completed at SDC. The earlier work in the first cycle, a similar analysis of data for 27 SDC computer programming efforts, is also described. After the publication of TM-2712, the second cycle was continued by additional analysis of the same SDC data for 74 computer programming efforts. The aim of the additional work was to improve the estimating precision of the equations presented in TM-2712. The improvements reported were achieved by deriving new cost equations, one set based upon a truncated sample and then three sets based upon three subsamples of the data. An interim evaluation of the work completed in the first and second cycles presents proposed improvements in approach and research methods.
- Economics and Cost Analysis
- Computer Programming and Software