A recent statistical study of the various economic aspects of software maintenance management in Tunisia is presented. The study confirms a well-known result, that software maintenance is very time consuming. It was also found that software maintenance escapes the software manager's notice. In the study, only one in ten managers considers maintenance problems important or very important. In addition, it was shown that the longevity of software applications does not depend on the data processing environment. It is concluded that Software maintenance is controllable. Combined with appropriately calibrated cost-estimation techniques, organizational steps developed by the community of software practitioners can be arranged into an integrated policy for software maintenance.