Japan Manned Space Systems, Japan

Abstract

This chapter summarizes the CoBRA application in the context of Japan Manned Space Systems Corporation, Japan (JAMSS). In this chapter, we will show how to adapt the baseline CoBRA model development process to the specific context of independent verification and validation (IV&V), which is different from the kind of software development to which CoBRA is typically applied. We will demostrate how to create CoBRA models for different IV&V objectives and how to address typical constraints of the IV&V context.

Further Reading

• H. Nakao, A. Trendowicz, J. Münch, “Estimating Effort of an Independent Verification and Validation in the Context of Mission-Critical Software Systems—A Case Study.” Proceedings of the 20th International Conference on Software Engineering and Knowledge Engineering, Redwood City, San Francisco Bay, USA, 1–3 July 2008, pp. 167–172.

  This paper reports on the pilot application of the CoBRA method at JAMSS described in this chapter. Yet, the authors do not focus on a detailed description of the CoBRA modeling process. Instead, they concentrate on an empirical comparison of the predictive performance of three alternative effort estimation strategies: expert-based, data-driven, and hybrid. For this purpose, the authors compare the estimation accuracy and precision of three methods that represent these strategies: expert judgment, ordinary least-squared regression, and CoBRA. A statistical analysis showed that in case of both estimation accuracy and precision, CoBRA outperforms the other two methods.