Formula for Calculating Sewing Room Capacity



Sewing Line
The formula used for calculating available capacity of the sewing line has been given below. 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)
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 available capacity of the floor. 

For example: A factory floor has 5 lines. Factory works for 8 hours day. 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 in the floor. Suppose a factory produces basic full sleeve shirt of SAM 20. Shirt production capacity of the floor will be 1463 pieces per day (29268/20).