 # How to calculate efficiency of a production batch or line?

#### How to calculate efficiency of a production batch or line?

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. 