To know the performance of a garment factory and for the comparative study of the sewing line performance, we measure production line efficiency. So, like individual operator efficiency, measuring the efficiency of a production line is important for a factory.
Daily line efficiency data shows line performance for the day. Once you start calculating line efficnecy everyday for your factory and observe the line effiicency trend for a month or a quarter, you will get the average of the Line efficiency.
Production Line Efficiency Calculation – Information required
To calculate the efficiency of a line for a day, you will need the 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 ran 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 the exact standard minute of the style (garment)
Once you have the above data you have to calculate the following using the above information –
Now, calculate line efficiency using the following formula:
Line efficiency (in percentage) = (Total minutes produced by the line *100) /(Total minutes attended by all operators)
An example – Calculating Production Line Efficiency
Let’s calculate the line efficiency of one production line.
Here,
Total minutes produced = (160 x 44.25) = 7080 minutes
Total minutes attended = (48 operator x 8 hours x 60) = 23040 minutes
Effiicnecy% = (7080 x100)/23040 % = 30.729%
For more examples, refer to the following table. The data calculation formula has been given on the header row of the table.
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| Table: Line Efficiency Report Template |
Here is one Video Guide for calculating overall efficiency.
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