This master thesis was performed in cooperation with SchlumbergerSema. During the project we identified several maintenance methodologies and studied the characteristics of both the ISO and IEEE standard. The base for our evaluation of the CURE maintenance model (developed by SchlumbergerSema) were both the result of our case study that comprised interviews from five maintenance projects as well as maintenance literature available. Both the interviews and the literature studies resulted in lists of requirements that each area make on a maintenance model. We compare the CURE model to the requirements found within these two areas. Based on the result of the comparison we give our recommendations for maintenance in general, maintenance within SchlumbergerSema as well as specific recommendations for the CURE development team. Our conclusions drawn from our work were mostly positive about CURE. However we have suggested several issues for further development such as e.g. certification to a standard. Other conclusions are that no matter what model you choose as a maintenance model, make sure that you implement the model fully. A major pitfall is to allow it to become "just a fancy book on the shelf". / Erik Björling - erik@bjorling.com Anna Hoff - pt97hol@student.bth.se