UCPabc as an integration model for software cost estimation

This study aims to construct a scientific model in estimating effort and cost of software development projects. Use Case Points (UCP) is very important method to estimate the total effort in software development projects. While the technique of Activity-based Costing (ABC) serves as the calculation of costs in each of the activities, especially the allocation of project resources. ABC technique consists of five stages are estimates based on the allocation of its resources, by having the total of UCP first. The result of this research is a proposed model of integration between UCP and ABC method or also called UCPabc. UCPabc model testing performed on five software development project small-medium scales. The results of test evaluations UCPabc estimation model with the company's actual cost turned out to be quite impressive, which the deviation only 2.16 percent. Meanwhile, the company forecast profit margin of 30.4 percent between total project contract value with cost estimation by using UCPabc.