A Calibration of the Revic Software Cost Estimating Model.
Abstract
This s%dy examined the change in performance resulting from cajibration of the REVIC software cost model and whether calibration improced the model's ability to estimate softrrare development costs. Three calibrations were conducted On two operating environments using the SMC database. The calibrations consisted of one coefficient only and two coefficient and exponent calibtations, using different procedures. Analysis of the goodmss of fit" was accomplished using MRE, MMRE, RMS, RRMS, and the prediction test to measure the model's improvement in predicting ability. The Wilcoxon and Wilk-Shapiro tests were used to test for normality of the sample 6tsi The autbor concluded that the REVIC model's predicting ability is insufficient when more than one independent variable is impacting cost. IR the case of the two operating en'viromtnents selected, military groud and unman% space, the improvement in the estrmating ability of the model, following calibration, was insfficient to predict cost in either the military goottnd or the unnsn% space environment withan an acceptable confidence level.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1995
- Accession Number
- ADA300694
Entities
People
- Betty G. Webber
Organizations
- Air Force Institute of Technology