GB/T 5080.4-1985

This standard specifies the statistical methods for calculating point estimates and confidence intervals for equipment reliability when the time-to-failure follows an exponential distribution. It is applied in reliability determination tests for electrical and electronic equipment, such as components, assemblies, or systems, to quantify their mean time between failures (MTBF) or failure rate based on test data. The standard is used by engineers and procurement professionals in industries like electronics, telecommunications, and manufacturing to assess and compare product reliability during design validation, production acceptance, or procurement qualification.