Like individual operator efficiency, efficiency of a production line or batch or section is important for a factory. Daily line efficiency shows the line performance. To calculate efficiency of a line for a day, you will  need following data (information) from the line supervisor or line recorder.

1. Number of operators – how many operators worked in the line in a day
2. Working hours (Regular and overtime hours) – how many hours each of the operators worked or how many hours the line run in a day
3. Production in pieces – How many pieces are produced or total line output at the end of the day
4. Garment SAM – What is exact standard minute of the style (garment)

Once you have above data you have to calculate following using above information -
a. Total minutes produced by the line: To get total produced minutes multiply production pieces by SAM
b. Total minutes attended by the all operators in the line: Multiply number of operators by daily working hours and convert total hours into total minutes (multiplying by 60).

Now, calculate line efficiency using following formula:
Line efficiency (in percentage) = Total minutes produced by the line *100 /total minutes attended by all operators

For example, refer following table. Data calculation formula has been given on the header row of the table.

 No. of Operator (A) Working hours (B) line output (production) (C) Garment SAM (D) Total minutes attended (E=A*B*60) Total Minute  produced (F=C*D) Line Efficiency (%) (F/E*100) 48 8 160 44.25 23040 7080 30.73 48 11 240 44.25 31680 10620 33.52 34 8 300 25 16320 7500 45.96 35 11 400 25 23100 10000 43.29 35 11 329 25 23100 8225 35.61 34 8 230 25 16320 5750 35.23 34 8 200 35 16320 7000 42.89 35 11 311 35 23100 10885 47.12 34 11 340 35 22440 11900 53.03

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Online Clothing Study: How to calculate efficiency of a production batch or line?
How to calculate efficiency of a production batch or line?
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