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Software Estimation has always been one of the prompting challenges for the software engineers. Software cost estimation techniques helps in forecasting the amount of effort required to develop software. COnstructive COst MOdel (COCOMO) is considered to be the most widely used model for effort estimation. Cost drivers have great influence on the COCOMO and this paper investigates the role of cost drivers in improving the precision of effort estimation using different membership functions. Fuzzy logic-based estimation models are more suitable when formless and inaccurate information is to be used. The proposed fuzzy COCOMO model consists of a collection of linear sub models joined together smoothly using fuzzy membership functions.
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