The Competitive environment in Oil & Gas motivates drilling operations to continuously
focus on increasing safety and cost effectiveness. To ensure this, optimal reliability and appropriate
maintenance of rig equipment is a must. Optimized maintenance plays a key role in balancing the
maintenance parameters (legislative, economic and technical) and the available resources to carry
out the maintenance programme. Effective implementation of maintenance optimization leads to
improved system availability, reduces overall maintenance cost, further improves equipment
reliability and elevates system safety.
The role Simplified Technical English, STE, plays in aviation maintenance has been investigated and discussed in this article. A brief history of the development of the ASDSTE100 Specification  within the aviation industry, together with its range of application, an overview of its principles, structure and rules are presented. The primary objective of STE is the removal of linguistic barriers in a continuous attempt for the correct understanding of the instructions by the operators, the improvement of flight safety and reliability.
Quality Centered Maintenance (QCM) is representing an idea of active relation between maintenance on one side and quality on the other. Safe Maintenance is one of the tools of the QCM, which secures product safety and provides hazard control on an operational level in terms of controlled maintenance activities.