On the applicability of capability models for small software organizations: does the use of standard processes lead to a better achievement of business goals?

Abstract

The ISO/IEC 15504 standard implies that the use of its level-based capability model for software process development leads to a better business performance. At capability level 3, this would mean that there is not only a positive correlation but also a causal relation from the use of standard processes to better achievement of business goals. In this paper, we make this claim explicit and challenge it with a counterargument in the context of small software organizations. We argue that in most part, the way the software is designed is what determines the business success in software development, and when application domains are complex socio-technical systems, relying on a standard process instead of human expertise not only fails to answer the promise of process stability but also presents business risks related to poor design, a loss of diversity, and reduced adaptability. With reasons to believe that the standard’s claim is weak in this context, we come up with alternative explanations for why some small software organizations nevertheless use standard processes. Through these hypotheses, we argue that the reasons are not necessarily process-related. In closing, we suggest further studies on how the standard’s notion of process capability and business goals relate to each other when the application domain is not just complicated but complex.