Mohsin Irshad MSE-2010:38, pp. 85. COM/School of Computing, 2010.
Context. Software Reuse is considered as silver-bullet
for software development. However, measuring benets of
software reuse is difficult and cumbersome task because of
varying number of factors involved in it. Dierent reuse
cost models already exist in literature which measure var-
ious dierent attributes of software reuse. Mainly these
models are used for calculating return over investment or
Objectives.We have investigated that very few cost eco-
nomic models have been proposed for measuring costs avoidance,degree of empirical validation, assumptions, types ofartifacts they can measure and whether they provide guide-
lines on collection of metrics for measuring reuse benets.
Methods.In this research, a systematic review was con-
ducted. Based on the results of systematic review, a model
was proposed which can measure cost avoided by reuse of
every kind of artifact. In a systematic all major article
sources were used. Studies were selected after reading titles and abstracts. Three cost avoidance models were found
and an analysis of these models was performed. Based on
the analysis, a new model was proposed to ll the gap left
by these studies.
Results. New model measures every kind of reuse artifact and provides guidelines on how and what to measure
in order to calculate reuse benets. This model was then
validated in the industry and technology was transferred
to the industry for future usage. Guidelines for improved
savings were developed.
Conclusions. We conclude that many models are related
to each other and use similar techniques to measure the cost
avoidance however they can not measure all kinds of reuse
artifacts. New model performed well in industry. However, we found that the new model should accommodate maintenance costs since these are major savings by software reuse. Moreover, we conclude that there is a need for further validation of guidelines and model in industry.
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