Production formula

Production capacity formula

Sewing capacity for a period in minutes and pieces, after absenteeism and efficiency.

Formula

C_{pcs} = \dfrac{L \times O \times (1-a) \times H \times 60 \times D \times \eta}{\text{SMV}}

Symbol	Meaning	Unit
L	Lines	-
O	Operators per line	persons
a	Absenteeism as a fraction	-
H	Working hours per day	h
D	Working days in the period	days
η	Average efficiency as a fraction	-

When to use it

Use it for order booking and monthly planning. Express mixed orders in minutes and compare with capacity minutes.

Worked example#

2 lines × 40 operators, 5% absenteeism, 8 hours, 26 days, 60% efficiency, SMV 10.

Available minutes = 80 × 0.95 × 480 × 26 = 948,480
Earned minutes at 60% = 569,088
Capacity = 569,088 / 10 = 56,908 pcs per month (about 2,188 per day)

Where this formula is explained

Industrial EngineeringHow-to3 min read

Garment Factory Capacity Calculation: Minutes, Pieces and Lines

How to calculate sewing capacity in available minutes and in pieces, for a line or a whole factory, and how to use it to check whether an order fits. Includes efficiency, absenteeism, working days and a full worked example.