Stress–strength analysis
Stress–strength analysis is the analysis of the strength of the materials and the interference of the stresses placed on the materials, where "materials" is not necessarily the raw goods or parts, but can be an entire system. Stress-Strength Analysis is a tool used in reliability engineering. Environmental stresses have a distribution with a mean formula_1 and a standard deviation formula_2 and component strengths have a distribution with a mean formula_3 and a standard deviation formula_4. The overlap of these distributions is the probability of failure formula_5. This overlap is also referred to stress-strength interference . Reliability. If the distributions for both the stress and the strength both follow a Normal distribution, then the reliability (R) of a component can be determined by the following equation: formula_6, where formula_7 P(Z) can be determined from a Z table or a statistical software package.