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Industrial Engineering
Line Efficiency
Earned vs available minutes on a sewing line.
Interactive calculator
Line Efficiency
Compare earned minutes to available minutes on a sewing line.
This calculator is a shared implementation from the Garment Knowledge Calculators Centre. Values never leave your browser. The “Copy shareable link” button below the inputs captures the current values in the URL so a colleague can reopen the same result.
Worked example
40 operators × 480 available minutes = 19,200 available minutes; 800 good garments × 18 SMV = 14,400 earned minutes.
14,400 ÷ 19,200 × 100
75% line efficiency.
Limitations
- Use validated garment SMV and good output; rejected or reworked pieces must not inflate earned minutes.
- Separate planned breaks, approved downtime, absenteeism and learning-curve effects according to the factory's agreed IE policy.
- Compare like-for-like shifts and styles; a single shift is not a stable benchmark.