Method
of Garments Costing for Knitted Basic T-Shirt (Factory Costing)
Garment manufacturing business same as other business, every
factory set for profit generation. In garments industry, fabric consumption is
an important factor and task for garment Merchandiser. Because profit can be
maximized by saving from each cost factor of garment making. For making garment
product, fabric is the most important factor and it takes almost 50 % to 70% of
the total product making cost. Actually, garment making cost depends on fabric,
and for an order how much fabric is needed to fill up the order including cut
wastage. That’s why fabric consumption must be calculated accurately to
maximize the profit from an order.
Presently, most of the garment industry is using a cad marker
for fabric consumption by the technical pattern master. No one bothers how it
is done. If we have product technical sheet, then we can calculate the fabric
consumption of garment by using technical sheet. Also need specific information
of fabric like - fabric is solid or all over print, chest print, stripe or any
specific design. For better understanding and calculation, follow the below
example;
Basic formula of fabric consumption:
Basic formula of fabric consumption:
Formula - 01: In centimeter
(Body Length + Sleeve Length + Seam Allowance) x (½ Chest + Seam Allowance) x 2 x GSM / 10,000 / 1000 + 10% (Wastage and extra cutting) x Doz. + TF (Trim Fabric)
(Body Length + Sleeve Length + Seam Allowance) x (½ Chest + Seam Allowance) x 2 x GSM / 10,000 / 1000 + 10% (Wastage and extra cutting) x Doz. + TF (Trim Fabric)
Formula - 02: In Inch
(Body Length + Sleeve Length + Seam Allowance) x (½ Chest + Seam Allowance) x 2 x GSM / 1550 / 1000 + 10% (Wastage and extra cutting) x Doz. + TF (Trim Fabric)
To estimate the fabric consumption for knitted Basic T-shirt, we will use above one of the formulas. There is some basic information needed to estimate fabric consumption, they are -
(Body Length + Sleeve Length + Seam Allowance) x (½ Chest + Seam Allowance) x 2 x GSM / 1550 / 1000 + 10% (Wastage and extra cutting) x Doz. + TF (Trim Fabric)
To estimate the fabric consumption for knitted Basic T-shirt, we will use above one of the formulas. There is some basic information needed to estimate fabric consumption, they are -
·
Fabric type and weight
of the garment
·
Measurement
sheet
·
Sewing allowance of
the garment
·
Cutting & sewing
wastage in percentage
Formula - 01: If garment measurement use in CM (Centimeter)
Suppose, knitted basic T-shirt has been following information. We need to estimate fabric consumption of the product.
Item: Knitted basic T-shirt garment components are front, back and short sleeves. Fabric GSM (Gram per square) is 160.
Suppose, knitted basic T-shirt has been following information. We need to estimate fabric consumption of the product.
Item: Knitted basic T-shirt garment components are front, back and short sleeves. Fabric GSM (Gram per square) is 160.
|
Measurement
|
Centimeter
|
|
Body Length (BL)
|
46.5 cm
|
|
Sleeve Length (SL)
|
14 cm
|
|
½ Chest
|
34 cm
|
|
Measurement
|
Centimeter
|
|
Body Length (BL)
|
= 46.5 cm + 4 cm =
50.5 cm
|
|
Sleeve Length (SL)
|
= 14 cm + 4 cm = 18
cm
|
|
½ Chest
|
= 34 cm + 4cm = 38
cm
|
·
TF (Trim Fabric - Neck rib / binding) is 0.15
kg/Doz.
As
per above measurement of this style, fabric consumption is;
= (BL + SL) x ½ Chest x 2 x GSM / 10,000 / 1000 + 10% Wastage x Doz. + TF
= (50.5 + 18) x 38 x 2 x 160 / 10,000 / 1000 + 10% x 12 + TF
= 1.0995 + 0.15 = 1.25 kg / Doz.
Formula - 02: If garment measurement use in Inch
Item: Knitted basic T-shirt garment components are front, back and short sleeves. Fabric GSM (Gram per square) is 160.
= (BL + SL) x ½ Chest x 2 x GSM / 10,000 / 1000 + 10% Wastage x Doz. + TF
= (50.5 + 18) x 38 x 2 x 160 / 10,000 / 1000 + 10% x 12 + TF
= 1.0995 + 0.15 = 1.25 kg / Doz.
Formula - 02: If garment measurement use in Inch
Item: Knitted basic T-shirt garment components are front, back and short sleeves. Fabric GSM (Gram per square) is 160.
|
Measurements without
allowance
|
Inch
|
|
Body Length (BL)
|
18.307 inch
|
|
Sleeve Length (SL)
|
5.511 inch
|
|
½ Chest
|
13.386 inch
|
|
Measurements with
allowance
|
Inch
|
|
Body Length (BL)
|
= 18.307 inch + 2
inch = 20.307 inch
|
|
Sleeve Length (SL)
|
= 5.511 inch + 2
inch = 7.511 inch
|
|
½ Chest
|
= 13.386 inch + 2
inch = 15.386 inch
|
·
TF (Trim Fabric - Neck rib / binding) is 0.15
kg/Doz.
As
per above measurement of this style, fabric consumption is;
= (BL + SL) x ½ Chest x 2 x GSM / 1550 / 1000 + 10% Wastage x Doz. + TF
= (20.307 + 7.511) x 15.386 x 2 x 160 / 1550 / 1000 + 10% x 12 + TF
= 1.166 + 0.15 = 1.3164 kg / Doz.
Please note that, we used above formula to estimate only fabric weight that is consumed by a garment. Using the above formula, we didn’t include fabric loss due to fabric width, marker process loss and dying process loss or any defects. When we are going to purchase fabric from mills, we have to consider all of these parameters.
= (BL + SL) x ½ Chest x 2 x GSM / 1550 / 1000 + 10% Wastage x Doz. + TF
= (20.307 + 7.511) x 15.386 x 2 x 160 / 1550 / 1000 + 10% x 12 + TF
= 1.166 + 0.15 = 1.3164 kg / Doz.
Please note that, we used above formula to estimate only fabric weight that is consumed by a garment. Using the above formula, we didn’t include fabric loss due to fabric width, marker process loss and dying process loss or any defects. When we are going to purchase fabric from mills, we have to consider all of these parameters.
