Requirements-based
estimation of Change Costs
Luigi
Lavazza and Giuseppe Valetto
CEFRIEL
and Politecnico di Milano
Abstract
We
present a case study that aims at quantitative assessment of the impact of requirements
changes, and quantitative estimation of costs of the development activities that must be
carried out to accomplish those changes.
Our approach is based on enhanced traceability and an integrated view of the process and
product models. The elements in the process and product models are quantitatively
characterised through proper measurement, thus achieving a sound basis for different kinds
of sophisticated analysis concerning the impact of requirements changes and their costs.
We present the results of the application of modelling and measurement to an industrial
project dealing with real-time software development. The ability to predict the impact of
changes in requirements and the cost of related activities is shown.
Keywords:
requirements management, change management, software process modelling, software
measurement, cost estimation.
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