Understanding the effects of requirements volatility in software engineering by using analytical modeling and software process simulation

0164-1212/$ see front matter 2009 Elsevier Inc. A doi:10.1016/j.jss.2009.03.014 * Corresponding author. Tel.: +1 817 272 1332; fax E-mail addresses: [email protected] (S. Ferreira), col [email protected] (D. Shunk), [email protected] (G This paper introduces an executable system dynamics simulation model developed to help project managers comprehend the complex impacts related to requirements volatility on a software development project. The simulator extends previous research and adds research results from an empirical survey, including over 50 new parameters derived from the associated survey data, to a base model. The paper discusses detailed results from two cases that show significant cost, schedule, and quality impacts as a result of requirements volatility. The simulator can be used as an effective tool to demonstrate the complex set of factor relationships and effects related to requirements volatility. 2009 Elsevier Inc. All rights reserved.