This book is focused on how to build a comprehensive single maintenance framework from multi maintenance strategies and this frame work now is known as "the integrated maintenance framework". This frame is applied on a gas compression plant and the results were compared by determine the availability and the overall equipment effectiveness (OEE %) that provided a perfect improvement into the system. The study showed a new methods on how to rank a list of failures based on their contribution into the total down time. This new technique is known as the total down time (TDT) importance and also suggested a constructive way for applying the key performance indicator for the large maintenance sectors.