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Research and Application of Value Adjustment Factor Based on IFPUG Function Point Analysis Method

Author: LiuWenHao
Tutor: YinJunWen
School: National University of Defense Science and Technology
Course: Computer technology
Keywords: Software Estimation IFPUG Function point metrics Value adjustment factor
CLC: TP311.52
Type: Master's thesis
Year: 2008
Downloads: 37
Quote: 1
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Abstract


In the early stages of development of the project in order to have a general grasp and a general understanding of the scale of the entire project, the software size measurement has become one of the key technologies in the field of software engineering. Software size measure a variety of ways, of which the most widely used is studied in this paper IPFUG (International FunctionPoint Users Group, referred to organizations IFPUG) Function Point Analysis method FPA (Functional PointAnalysis). Although widely used, but in the course of the FPA method there is less than the following: 1. Calculation software project value adjustment factor (VAF: Value Adjustment Factor), 14 basic characteristics of properties (GSC: General System Characteristics) the impact of the extent of the value of the (DI: Degree of Influence) Rules set is not reasonable, the software scale in 14 GSC DI are \2, the various functional modules of a software project may exhibit different characteristics attributes, should be determined separately according to the type of feature attribute VAF, then calculate its adjusted function point (AFP: AdiustedFunction to the Point). For the above shortcomings, the author of the following analysis and improvement project examples FPA method: 1. Revised rules for evaluating GSC DI value and VAF is calculated. The basic idea is that the DI value of 14 GSC re-assignment, when the degree of influence of the GSC for the \options GSC GSC all \The DI values ??less power to handle, to achieve the goal is to make the VAF calculation results more reasonable. Proposed the the new AFP calculation process, the system to be estimated is divided into different functional modules, each module were calculated VAF, then VAF then each module and each module the unadjusted function after point (UFP: Unadjusted FunctionPoint) multiplied draw each module AFP, final calculation module AFP and this as the AFP to be estimated and values, to achieve the goal of the calculation results of the AFP is more reasonable. Finally, to the examples of projects on the pros and cons before and after improvement metrics were compared. The results show that, the the FPA method of improved software size estimates closer to the actual development of the project.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Software Engineering > Software Development
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