Gerald Weinberg refers to this same concept as "maintenance debt" in his four volume "Quality Software Engineering Series" from the early-mid-90's. I think it's

Gerald Weinberg refers to this same concept as "maintenance debt" in his four volume "Quality Software Engineering Series" from the early-mid-90's. I think it's an independent formulation of the same concept. The volume most concerned with it is Vol4 "Anticipating Change" http://www.amazon.com/Quality-Software-Management-Anticipating-Change/dp/0932633323 http://www.amazon.com/Quality-Software-Management-Anticipati... The whole series is definitely worth reading.