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% 5184.0Line 2 28 480 50% 10% 6048.0Line 3 32 480 55% 10% 7603.2Line 4 32 480 45% 10% 6220.8Line 5 25 480 39% 10% 4212.0Total 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).