COCOMO Model

Basic COCOMO Model



The basic COCOMO model helps to obtain a rough estimate of the project parameters. It estimates effort and time required for development in the following way: Effort = a * (KDSI)^b PMTdev = 2.5 * (Effort)^c Monthswhere
• KDSI is the estimated size of the software expressed in Kilo Delivered Source Instructions
• a, b, c are constants determined by the category of software project
• Effort denotes the total effort required for the software development, expressed in person months (PMs)
• Tdev denotes the estimated time required to develop the software (expressed in months)


The value of the constants a, b, and c are given below: 


Software project	a	b	c
Organic	2.4	1.05	0.38
Semi-detached	3.0	1.12	0.35
Embedded	3.6	1.20	0.32