The customer typically expresses their needs, expectations, and constraints in non-technical terms. Technical requirements need to be clear, unambiguous, and measurable. Developing reliability requirements is the process of translating user requirements into technical requirements.
Reliability models present a clear picture of functional interdependencies and provide a framework for developing quantitative product level RAM estimates. Simple RAM models can be analytically solved, whereas complex RAM models typically require simulation to solve.
Failure mode and effects analysis (FMEA) or Failure Mode, Effects, and Criticality Analysis (FMECA) is a reliability evaluation and design review technique that examines potential failure modes, determines the effects of these failure modes, and identifies controls. The FMEA/FMECA is an inductive analysis that begins at the lowest level of the system hierarchy and traces up to the highest level.
There will invariably be reliability and performance problems that could not be foreseen and eliminated during early design stages. Reliability growth testing exposes the system to the range of stresses that it is expected to encounter during it's life cycle in order to uncover these deficiencies.
Preventive Maintenance Optimization (PMO) is logical, structured framework for determining the optimum mix of applicable and effective maintenance tasks needed to sustain operational reliability at the desired level.