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Software researchers and practitioners have been addressing the problems of effort estimation for software development projects since at least the 1960s; see, e.g., work by Farr [8] [9] and Nelson. [10] Most of the research has focused on the construction of formal software effort estimation models.
The Putnam model is an empirical software effort estimation model [1] created by Lawrence H. Putnam in 1978. Measurements of a software project is collected (e.g., effort in man-years, elapsed time, and lines of code) and an equation fitted to the data using regression analysis .
For the Online Shopping System, the total estimated size to develop the software is 125.06 Use Case Points. Now that the size of the project is known, the total effort for the project can be estimated. For the Online Shopping System example, 28 man hours per use case point will be used. Estimated Effort = UCP x Hours/UCP
There are several cost, schedule, and effort estimation models which use SLOC as an input parameter, including the widely used Constructive Cost Model series of models by Barry Boehm et al., PRICE Systems True S and Galorath's SEER-SEM. While these models have shown good predictive power, they are only as good as the estimates (particularly the ...
Sizing. How large is the software project being estimated (Lines of Code, Function Points, Use Cases, etc.) Technology. What is the possible productivity of the developers (capabilities, tools, practices, etc.) Effort and Schedule Calculation. What amount of effort and time are required to complete the project? Constrained Effort/Schedule ...
Measuring the size of the non-functional software improves the work effort estimation of software development based on functional user requirement sizing alone. Measures the size of algorithms, using subcategory 1.2. This improved work effort estimation should also lead to better estimates of scheduling, resource allocation, and risks.
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