Clear concept on correct fabric consumption and costing is a primary requisite for a merchandiser as fabric cost bears the 40% to 45% of the total cost of any garments.
To calculate the fabric consumption of knit garments we need following information:
a. Body length of the garment in cm. Suppose it is - 70 cm+5cm (Sewing allowance)=75cm
b. 1/2 Chest width in cm. Suppose it is 48 cm+2cm (Sewing allowance)=50cm
c. Sleeve length of the garment in cm. Suppose it is 20 cm+5cm (Sewing allowance)=25cm
d. Armhole circumference in cm. Suppose it is-40cm+2cm (Sewing allowance)=42cm
e. Fabric GSM. Suppose it is 180 gsm
f. Percentage of fabric wastage. Suppose it is 10%
***For consumption we have to consider the measurement of middle size garment or the garment containing maximum quantity.
Consumption:
Fabric
Consumption Calculation of a Knit T-Shirt
|
Length
|
Width
|
Consumption in SCM
|
Back Part
|
|||
75 cm ( length)
x 50 cm ( Chest width)
|
75
|
50
|
3,750 scm
|
Front Part
|
|||
75 cm ( Front
length) x 50 cm ( Front chest width)
|
75
|
50
|
3,750 scm
|
Sleeve
|
|||
25 cm ( Sleeve
length) x 42 cm ( Armhole circumference) x 2 ( 2 sleeves)
|
25
|
42
|
2,100 scm
|
Total Fabrics
Consumption
|
9,600 scm/pc
|
Now we can apply following formula to make consumption for 1dzn garments :
=(Fabric consumption in SCM X GSM X 12 / 10,000,000) + Wastage
=(9600 X 180 X 12 / 10,000,000) + 10%
=2.0736+10%
=2.0736+0.20736
=2.280 KG/DZN
or
Let us
make the 9600 scm into sm. We know 10000 scm=1sm
|
0.960 sm/pc
|
Fabric is
180gsm, (that is, 1sm=180gram). So 0.960 sm=0.960x180=
|
172.8 gram/pc
|
We know
1,000gram=1kg. So 172.8 gram=172.8/1,000=
|
0.1,728 kg/pc
|
Wastage 10%
|
0.01728 kg
|
Total Weight
with wastage
|
0.19008 kg/pc
|
Therefore,
Weight of 1dzn (12 Pcs)
|
2.280 Kg/Dzn
|
Note:
scm=square centimetersm=square meter
*Why 12?
Ans: Calculation of 1dozen (12pcs) garments
*Why 10,000,000?
Ans: 10,000 x 1,000=10,000,000
We know GSM = Grams per square meter. Conversion of the fabric into square meter. 1m=100cm, 1sqr meter=10,000 cm (100cm x 100cm),
We know Kg=1,000 Gram.
Consumption is an important as well as key factor for merchandising. Since it depends on fabric prices therefore accurate and closure consumption will reduce wastage as well as production lead time.
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Also know about Fabric Consumption and Cost per dozen of a Trouser
Thanks for the above information, It's very easy and helpful to understand.
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