Explain the concepts of SLIM estimating model.It is one of the first algorithmic models for estimating software project costs. It is based on Norden-Rayleigh function and is commonly used for large projects. SLIM also uses historical data from past projects for estimation. It also uses and considers other project parameters, characteristics, attributes and KLOC for its estimation calculation.
Total Life cycle effort (years) = ( LOC / ( C * t4/3 )) * 3
t is development and C is technology constant which is determined from tools, language, methods, quality features etc. This make SLIM dependent on C which is a disadvantage.