QualExtUseN
QualExtUseN is a metric framework used to quantify the quality and impact of external extensions within modular software systems. It provides a single numeric score intended to support governance, risk assessment, and decision making in environments with plugin or extension ecosystems.
The term QualExtUseN, short for Quality Extension Use Number, was proposed to standardize assessment of how
QualExtUseN is a composite score derived from four core submetrics: Compatibility (C), Reliability (R), Performance impact
Data is gathered from telemetry, static analysis, test coverage, API stability, error rates, update frequency, and
QualExtUseN supports decision making in plugin governance, release planning, and risk assessment. Limitations include reliance on