A Modification Complexity Factor in Function Points Method for Software Cost Estimation Towards Public Service Application

Abstract Lately, the stages of planning software development projects have begun to consider the scientific side. As an intangible outcome, the budgeting must also be done in a transparent and accountable manner. The authors use Function Points (FP) method approach on the basis of 4 main reasons for estimating the effort and cost of software development (4 public service applications as research object). In this study, there are two core phases, first, elaborating complexity factors based on other method references (i.e Use Case Points) and mapping of non-functional requirements on Term of Reference. Furthermore, the second phase is to calculate and compare the estimated effort and cost if the original FP method before and after modified on the complexity factor. We conclude there is a difference of 7.19 percent (equivalent to IDR 13,567,631) between FP method calculations using and not using modified complexity adjustment factors.