Application software maintenance
Glenn L. Helms, Ira R. Weiss · ACM SIGMIS Database the DATABASE for Advances in Information Systems · 1984
Numerous studies have found that subsequent application software maintenance requires a significant amount of a data processing department's resources. Some of the major research in this area [1, 2, 3, 4] revealed the following:• in 1972, 30.1 percent of total programmer effort was devoted to maintenance• in 1978 twenty percent of the systems studied had allocated eighty-five percent of their annual analyst and programming hours to maintenance.• in 1979 as high as seventy-five percent of systems and data processing recourses were spent on application maintenance• a study determined that half of a data processing department's staff time was devoted to maintenance