A quantitative software quality metric calculated as the number of defects (bugs) per unit of development size (such as lines of code). Typically expressed in units like defects per KS (kilo-steps), a value below the lower threshold may indicate insufficient testing, while a value above the upper threshold signals a quality problem. Comparing against defined upper and lower limits allows quality to be evaluated at each development phase.

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• 2019r01a #47ソフトウェアの品質を判定する指標として，機能単位の不良件数をその開発規模で割った値を“不良密度”と定義する。不良密度の下限値と上限値を設定し，実績値がその範囲を…