Issue No.04 - July/August (1998 vol.15)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/52.687942
Drawing on extensive data from the NASA Space Shuttle's guidance software, Schneidewind proposes a method for evaluating the effectiveness of legacy software maintenance efforts. He provides several formulas for tracking maintenance stability defined as increasing functionality with decreasing failures, over time and offers data that supports their validity. Schneidewind also provides tips for applying his formulas to different projects.
Norman F. Schneidewind, "How To Evaluate Legacy System Maintenance", IEEE Software, vol.15, no. 4, pp. 34-42, July/August 1998, doi:10.1109/52.687942