SIG/TÜV NORD CERT Evaluation Criteria for Maintainability

This document is a guide detailing the SIG/TÜV NORD CERT Evaluation Criteria for trusted product maintainability aimed at software producers. It outlines the standardized evaluation and certification process for assessing the technical quality of software source code. The purpose of this guidance is to assist developers in improving their products and to aid acquirers in comparing and selecting pre-developed software. The document provides definitions of key terms such as system, component, module, and unit, which are essential for understanding the evaluation criteria. It also explains various measurement areas, including duplication, unit size, unit complexity, unit interfacing, and module coupling, along with the threshold values required for achieving a certification level of 4 stars. Each section offers specific guidance on how to meet these criteria, emphasizing the importance of maintainability in software development.