Mohsen Hasanluo - Department of Computer Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran.
Farhad Soleimanian Gharehchopogh - Department of Computer Engineering, Urmia Branch, Islamic Azad University, Urmia, Iran.

A successful software should be finalized with determined and predetermined cost and time. Software is a production which its approximate cost is expert workforce and professionals. The mostimportant and approximate software cost estimation (SCE) is related tothe trained workforce. Creative nature of software projects and its abstract nature make extremely cost and time of projects difficult toestimate. Various methods have been presented in the software projectcost estimation for performing a software project in the area of software engineering. COCOMO II model is one of the most documented models among template-based methods that has been proposed by Bohm. Common methods for estimating the time and cost are essentially abstract, accordingly, providing new methods for SCE is required andnecessary. In this paper, a new method is presented to solve the problem of SCE by using hybrid particle swarm optimization (PSO) algorithm and K-nearest neighbor (KNN) algorithm. The method was evaluated on 6multiple datasets with 8 different evaluation criteria. Obtained results show the more accurate performance of the proposed method.

Software Cost Estimation,PSO,KNN,Hybrid Method,Optimization,