Oil and gas plants are basic industrial facilities that produce a wide range of products used as fuels and chemicals. Maintenance activities within the oil and gas plants deeply affect its productivity. Thus, the maintenance program is essential and crucial for these types of industries. Nowadays, we live in a competitive environment, in which many companies are required to reduce their overall costs, while maintaining the value and reliability of their assets. Hence, the use of Reliability Centered Maintenance (RCM) can help organizations develop a systematic maintenance program, meeting these requirements in a cost effective manner. RCM basically combines different techniques and tools in a systematic approach to manage risks as a basis for maintenance decisions. That is why many people regard RCM as ' Total Quality Management applied to physical assets '.