PassFailRate

PassFailRate is a metric that expresses the proportion of outcomes that meet a defined passing criterion within a set of attempts. It is calculated as the number of passing outcomes divided by the total number of outcomes, usually expressed as a percentage. The term is common in education, software quality assurance, and manufacturing, and may be used interchangeably with pass rate or pass/fail rate depending on the context.

In education, pass rate represents the share of students who achieve a minimum passing score on an exam or course, and is a key indicator of program outcomes and eligibility for advancement. In software testing and QA, the pass rate shows how many tests pass in a test suite relative to the total tests executed, often used in continuous integration dashboards to gauge product stability.

Calculation details: PassFailRate = (Passed / Total) × 100%; the definition of passing is context-specific (score threshold, binary outcome, or successful completion). When tests are automated, PassFailRate can be tracked over builds or releases.

Limitations: A high pass rate does not guarantee absence of defects; it depends on test coverage and criteria; can be influenced by sample selection; statistical considerations such as confidence intervals should be used for small samples.

Related terms include pass rate, failure rate, defect density, and test coverage.