Product and service reliability has always been an important criterion for oil and gas operations, but, historically it has been difficult to measure consistent levels of reliability.
Transferring know-how
Other business sectors have a greater maturity in the use of reliability and quality principles. Aerospace and defense, for example, have a mature reliability culture after 60 years of sustained focus on the topic. Flight safety led to mandates on use of processes and procedures in the Military Handbook and Military Standards to execute development programs that meet high reliability/safety requirements. Today, learning from these industries is yielding more costeffective and efficient programs and processes for industrial and consumer products.
In classic terms, Reliability (R), is the probability of failure- free performance over an item’s useful life, for a specified timeframe or mission time (t), under specified environmental and duty-cycle conditions where probability of failure-free performance is greater than 0.9995. For most commercial aviation applications, reliability requirements are very stringent: for a mission time of t = 10 hours, R(10) can be greater than 0.999999, which necessitates use of tools capable of supporting probabilistic engineering and data analysis.
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