Eksploatacja i NiEzawodNosc – MaiNtENaNcE aNd REliability Vol.15, No. 4, 2013356 Article citation info:

SyStem reliability demonStration with equivalent data from component accelerated teSting baSed on reliability target tranSformation Stwierdzanie niezawodności SyStemu na podStawie równoważnych danych z przySpieSzonych badań elementów Składowych w oparciu o tranSformację celu niezawodnościowego The reliability demonstration test (RDT) programs in general proceed at various levels, including component, subsystem, and system in the verification and validation phase of the product life cycle. The system reliability demonstration within feasible dura-tion becomes a considerable issue because of the marketplace demands for decreased development time and cost. A method based on reliability target transformation is proposed to accomplish the system reliability demonstration with the data from the RDT of the components. In order to shorten the test time, the RDT plan for component under the accelerated condition is first designed. Then, the reliability target of the system with different lifetimes required by the producer and the consumer is transferred to the target with the same specified mission time, which should meet the time constraint of the system level test. Next, the lower limit confidence of component reliability at the system mission time are estimated and converted to the equivalent binomial component data by the curve fitting method, then they are synthesized to the equivalent binomial system data by the Bayesian method. Finally, the system reliability demonstration is considered. The system classical attribute acceptance sampling plan at the mission time is used to make decisions using the equivalent binomial system data. If the decision cannot be made, the system Bayesian attribute acceptance sampling plan will be designed with the equivalent data as the prior parameters and the complementary system test will be conducted