A model was designed to assist software developers in Nigeria to estimate software effort, duration and cost as a result of the difficulties in understanding the parameters of the traditional Constructive Cost Model II (COCOMO II) , which was designed for a specif ic environment, using Source Lines of Code (SLOC) . Results revealed that t he model guarantee 70% effort and 60% cost estimates accuracy to suite Nigeria information and communication software development environment.

Key words: Environment, Constructive Cost Model , Software , Estimate, Effort , Duration, Information , Communication, development.