International Journal of Computer Applications
There are many equation based effort estimation models like Bailey-Basil Model, Halstead model, and Walston-Felix model. Effort and cost estimation are the major concern of any sort of software industry. They are calculated with the help of Kilo Line COde (KLOC) which are the number of, line of code in software. For example if a software contain 1000 lines then it has 1 kilo line of codes. There are several ways to estimate it with various advantages and disadvantages. The authors can distinguish them in two parts, one is equation based and another is model based estimation techniques.