Accession Number : ADA300694

Title :   A Calibration of the Revic Software Cost Estimating Model.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF LOGISTICS AND ACQUIS ITION MANAGEMENT

Personal Author(s) : Webber, Betty G.

PDF Url : ADA300694

Report Date : SEP 1995

Pagination or Media Count : 87

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.

Descriptors :   *SOFTWARE ENGINEERING, *COST ESTIMATES, *COST MODELS, COMPUTER PROGRAMS, DATA BASES, ALGORITHMS, DEPARTMENT OF DEFENSE, CONTRACT ADMINISTRATION, PROGRAMMING LANGUAGES, ANALYSIS OF VARIANCE, ACCURACY, THESES, REGRESSION ANALYSIS, OPERATING SYSTEMS(COMPUTERS), CALIBRATION, CONFIDENCE LEVEL, NORMAL DISTRIBUTION, GOODNESS OF FIT TESTS.

Subject Categories : Economics and Cost Analysis
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE