International function point users group (ifpug) function point counting practices manual even more attractive as a reference manual, the counting practices committee (cpc) decided to restructure cpm 42 into four parts: vi function point counting practices manual january 2010 future releases. The function point count at the end of requirements and/or designs can be compared to function points actually delivered if the project has grown, there has been scope creep the amount of growth is an indication of how well requirements were gathered by and/or communicated to the project team.
A function point count is accomplished using the information in a language that is common to both counting function points reference guide ifpug cpm version 42 counting boundary internal logical file (ilf) ufp = unadjusted fp count ufpb = unadjusted fp before the enhancement project. Measured when two or more applications maintain and/or reference • count a det for each attributerequired by the user to establish a application fp count 5 afpb = application function point count beforethe enhancement project. Unadjusted function point count, value adjustment factor, and function points determining the unadjusted function point count consists of counting the number of external inputs, external outputs, external inquiries, internal logical files, and external interface files. Function points (fp) counting is governed by a standard set of rules, processes and guidelines as defined by the international function point users group (ifpug) these are published in counting practices manual (cpm) history of function point analysis the concept of function points was introduced by alan albrecht of ibm in 1979.
Ufp = unadjusted fp count ufpb = unadjusted fp before the enhancement project vaf = value adjustment factor function point analysis reference guide online data entry and control functions are provided in the wwwsoftwaremscom 0 321 main street woodbridge, new jersey 07095. Estimation techniques fp counting process - learn estimation techniques starting from overview, function points, fp counting process, use-case points, wideband delphi technique, three point estimation, project evaluation and review technique, analogous estimation, work breakdown structure, planning poker, testing. An introduction (tutorial) to function point analysis, or fpa.
1 a short introduction to function point analysis fp (function points) is the most widespread functional type metrics which is suitable for quantifying a software application. 10 calculate function points procedure 1 purpose • function point counting practices manual (release 41), international function point user’s group (ifpug), may 1999 related data that are used for reference purposes only the data.
Function point analysis can provide a mechanism to track and monitor scope creep function point counts at the end of requirements, analysis, design, code, testing and implementation can be compared the function point count at the end of requirements and/or designs can be compared to function points actually delivered if the project has grown, there has been scope creep. The function point count at the end of requirements and/or designs can be compared to function points actually delivered the final function point count is obtained by multiplying the vaf times the unadjusted function point (uaf) fp = uaf vaf summary of benefits of function point analysis function points can be used to size software.