Formula for Calculating Sewing Room Capacity

The formula used for calculating the available capacity of the sewing line is discussed here. The available capacity of a line is presented in minutes or hours.
Sewing room Capacity per Day= {(No. of machine x daily work hours x 60) – absenteeism %} x Efficiency % (unit in minutes)

Sewing Line
Monthly Capacity = Daily Capacity X No. of working days in a month

The capacity of a line depends on the average efficiency% of the line and operator absenteeism%. First, line-wise capacity is calculated and then added all line's capacity to calculate the available capacity of the floor. 

Things you need to know prior to using the above formula for calculating line capacity

  • Number of sewing machine in a line 
  • Shift hours in a day
  • Average operator absenteeism percent
  • Average line efficiency%

An example:

A factory floor has 5 lines. The factory works for 8 hours daily. No of total operators, line efficiency, and absenteeism percentage are as given in the following table.

Line No.
No. of Operator
Minutes/Day (Daily working Hrs. X 60)
Line Efficiency
Absenteeism %
Capacity available
Line 1
30
480
40%
10%
5184.0
Line 2
28
480
50%
10%
6048.0
Line 3
32
480
55%
10%
7603.2
Line 4
32
480
45%
10%
6220.8
Line 5
25
480
39%
10%
4212.0
Total Sewing floor capacity per day (in minutes)
29268.0

Available capacity of the line will vary on the factors such as
 i) no. of operators working in the line,
 ii) Line’s existing efficiency and
 iii) operator absenteeism percentage.

Capacity can be also represented in pieces. To get it, divide total capacity (in minutes) by SAM of the garment to be made on the floor. Suppose a factory produces basic full sleeve shirt of SAM 20. The shirt production capacity of the floor will be 1463 pieces per day (29268/20).

Also read: How to calculate the production capacity of garment factory?

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