Basic
formula of fabric consumption:
Formula - 01: In centimeter
(Body Length + Sleeve Length + Seam Allowance) x (½ Chest + Seam Allowance) x 2
x GSM × 12 / 10,000 / 1000 + 10% (Wastage and extra cutting) + 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)
Note: ½
Chest অথবা
Bottom width দুটোর মধ্যে
যেটার
Measurement বড় হবে
Costing-এ বড়
Measurement নিয়ে Costing করতে
হবে
।
Need verius consumption:
1.
Body fabric
consumption (Body & Sleeve )
2.
Fabric
consumption for Collar
3.
Fabric
consumption for Cuff
4.
Fabric consumption
for pocket
5.
Fabric
consumption for Half-moon
6.
Fabric
consumption for RIB
7.
Fabric
consumption for Hood
2.
Fabric consumption for Collar: (CM)
Here, we will follow the following formula (per dozen),
= Collar
length × Collar width × 12 × GSM /10,000 /1,000 + 10% wastage
3.
Fabric consumption for Cuff: (CM)
Here, we will follow the following formula (per dozen),
= Cuff
length × Cuff width × 2 × 12 × GSM / 10,000 / 1,000 + 10% wastage
4.
Fabric consumption for Pocket: (CM)
Here, we will follow the following formula (per dozen),
= Pocket
length × Pocket width × 12 × GSM /10,000/1000 + 10% wastage
5.
Fabric consumption for Half- moon: (CM)
Here, we will follow the following formula (per dozen),
= Half-moon
length × Half-moon width × 12 × GSM/10,000/1,000 + 10% wastage
6. RIB GSM is 340 (Inch)
As per above measurement of this style, the
fabric consumption of RIB is;
= (½ Bottom RIB length + Cuff Length) x Bottom Rib Width x 2 x
GSM / 1550 / 1000 + 10% Wastage x 12
7. Hood GSM is 160 (Inch)
As per above measurement of this style, the
fabric consumption of Hood is;
= Hood length x Hood Width × GSM / 1550 / 1000 + 10% Wastage x
12
Trouser:
Formula
- 01: In centimeter
{(IL +
Allowance + CFR + Allowance + WBW + Allowance) x (HTC + Allowance)} x 4 x GSM /
10,000 / 1000 + 10% (Wastage and extra cutting) x Doz.
Where,
IL =
Inseam Length
CFR =
Center front rise
WBW =
Waist Belt Width
HTC =
Half Thigh Circum
Formula
- 02: In Inch
{(IL +
Allowance + CFR + Allowance + WBW + Allowance) x (HTC + Allowance)} x 4 x GSM /
1550 / 1000 + 10% (Wastage and extra cutting) x Doz.
Knit fabric consumption from marker:
·
Marker (for 6 pc marker) ={( Length x Width ) x GSM / 1550
/1000 / 6 + Wastage% = Kg/pcs
Carton Consumption & Costing:
Per Carton
Consumption calculation rule:
= [{(Length + width + allowance) cm × (Width + Height + 4)} cm ×
2] ÷ 10,000
Per Carton
cost calculation rule:
= [{(Length + width + allowance) cm X (Width + Height + 4)} cm X
2] ÷ 10000 × per square liner rate
Calculation of CBM Formula = length × width × height ÷
1000000 × carton quantity
Problems-1: A carton with Length 60cm,
Width 40cm & Height 30cm, figure out a Cargo Measurement for 208 cartons?
Answer: 0.6 × 0.4 × 0.3 × 208 = 14.976 CBM
Problems-2: A carton of 7 Ply, Length 80cm,
Width 60cm, Height 30cm, total carton 120 pcs, find out carton measurement in
square meter ?
Answer: (80
+ 60 + 6) × (60 + 30 + 4) × 2 ÷ 10000 × 120 =329 Square Meters.
Formula: (length
+ width + wastage) × (width +
height + wastage) × 2 ÷ 10000 × carton quantity.
Problems-3: 3 ply carton’s per square (100 × 100) meter’s rate is USD 0.20,
carton’s length is 60cm, width 40cm, height 30cm, total required carton
quantity is 150 Pcs, figure out price of total cartons?
Answer: (60
+ 40 + 6) × (40 + 20 + 4) × 2 ÷ 10000 × 150 × 0.20 =
48.70 USD.
Formula: (length
+ width + wastage) × (width +
height + wastage) × 2 / 10000 × carton quantity × price
Problems-4:
Suppose,
A carton have length 22.845 inches, width 15.75 inches and height 15.75 inches.
Now find out the CBM for 150 cartons?
Solution:
·
Length
22.845 inches = So, 22.845 × 2.54 = 58 cm [ 1 inch = 2.54 cm]
·
Width
15.75 inches = So, 15.75 × 2.54 = 40 cm
·
Height
15.75 inches = So, 15.75 × 2.54 = 40 cm
Formula: Length × Width ×
Height / 10, 00,000 × 150 [1 CBM = 10, 00,000 square cm]
= 58 X 40 X 40 /10, 00,000 X 150
= 13.92 CBM
Finally we know that, we need 13.92 CBM
cargo for 150 cartons
Example of CBF (cubic feet) Calculation with formula:
Formula:
Length (inch) × Width (inch) ×
Height (inch) / 1728
Poly bag costing:
Q.1: Suppose, Poly bags having length is
29 cm, flap 5 cm, Width 26 cm & poly thickness 160 gauge. Now find out
weight of 1000 pcs poly bags?
Poly bag
thickness in (gauge < Micron < Mil), 1 mil > 1 microns > 1 gauges
Note: In conversion,
1 mil = 25 microns = 100 gauges
Solution:
Poly bags in KGs = {(Length + Half flap) X Width X Gauge / 3300}
= {(29 + 2.5) X 26 X 160 / 3300}
= {31.5 X 26 X 160 / 3300}
= 39.709 KGs for 1000 pcs
Note: We used half flap during
calculation because flap is single layer & length, width of poly bag is
double layer.
Q.2: Suppose, per pcs poly weight is
0.0397 KGs, polymer price 1 lbs (pound) is $0.35. Now find out the price of per
pcs poly?
Solution:
Per pcs poly weight X Polymer
price
= 39.709 / 1000 X $0.35
= 0.0397 X 2.2 X $0.35 [1 kg = 2.2 lbs]
= $0.03056 /pcs
Q.3: Suppose, Poly bags having length is
30 cm, half flap 5 cm, width 25 cm & poly thickness 150 gauge, 1 lbs
polymer price is $0.35. Now find out the cost 1 pcs poly bag?
Solution:
Poly bag cost = {(Length + Half flap) X Width X Gauge / 3300 /
1000 X Price}
= {(30 + 2.5) X 25 X 150 / 3300 / 1000 X $0.35}
= {32.5 X 25 X 150 / 3300 / 1000 X
$0.35}
= 0.0369 KGs X $0.35
= 0.0369 X 2.2 X $0.35 [1 kg = 2.2 lbs]
= $0.0284 / pcs
How do calculate Yards to kgs (Knit fabric)
Fabric Width = 45 "
Rules-1: If Fabric length (Inch)
Fabric weight (kg) = Fabric length (inch) × Fabric
width × GSM / 1550 / 1000
= 121" × 45" × 140 /1550 / 1000
= 762300 /1550 /1000
= 0.49180645161 kgs (weight of the followings fabric)
Rules-2: If Fabric length (Yards)
Fabric weight (kg) = Fabric length (Yard) × Inch per yard × Fabric
width × GSM / 1550 / 1000
Fabric weight (kg) = 3.3611 × 36 ×
45" × 140 / 1550 / 1000
Fabric weight (kg) = 0.4918048258
kg
Math: 1
Question No-1: Fabric Length 100 yds width 58
inch (Open) GSM 230, what is fabric weight?
Ans:
Fabric weight in Kg = Length (Meter) × Width
(Meter) × GSM in Kg
W (Kg) = l × w × GSM
= (100 Yds. × 36 × 2.54) /100 × (58 × 2.54)
/100 × 230/1000
= 91.44 x 1.4732 x .230
= 30.99
kg
Math: 02
Question: Fabric weight 50 kg, Fabric width
40 inch (tube) GSM 180. What is fabric length in meter?
Ans:
Fabric weight in Kg = Length (Meter) X Width
(Meter) X GSM in Kg
W (Kg) = l x w x GSM
50 = l x (40x 2.54x 2)/ 100 X 180/1000
L = 136.70 meter
= 136.70 x 1.0937 yds. [1 meter = 1.0937
yds.]
= 149.50 yds.
Math: 03
Question: Fabric price 2.25 USD/ yds, Width
45 inch open, GSM 200,
Consumption 3.20 kg / doz, what is the
garment fabric cost for per doz garments?
Ans: W (kg) = L (M) × w (M) × GSM (kg)
→ (3.20 × 100 × 1000) = L (M) × (45 × 2.54) /
100 × 200 /1000
→L (M) = (3.20 × 100 × 1000) / (45 × 2.54 ×
200)
= 13.99 (M)
= 13.99 × 1.0937 yds.
= 15.30 yds.
Fabric cost
(Per doz GMT) = Length × Unit price / yd.
= 15.30 × 2.25
= 34.56 USD / Doz
Gum Tape Consumption & Costing:
We know that,
Gum Tape Roll
Width =?
One Roll Gum
Tape Length =? Yards
Gum Tape consumption:
If Carton Measurement = 58 × 39 × 25, Total Carton = 50 pcs
That’s Means:
Length = 58 cm
Width = 39 cm
Height = 25 cm
Consumption Formula = (Length ×
2) + (Width × 4) + Allowance /2.54 / 36 × Total Carton
= 58 × 2 + 39 × 4 + 20
/ 2.54 /36 × 50
= 160 Yards
= 4 Roll [If one Roll =
50 Yards
Cost = Total Roll
× Price per Roll
Interlining Consumption
& Costing:
We know that,
Interlining
Roll Width = 40” (Forty Inch)
One Roll
Interlining Length = 100 Yards
Interlining consumption
Style: P18-0330
Suppose, For 6 pcs body’s need:
Interlining
length (by Marker) = 60”
If Total
Quantity = 3128 pcs
Than Total interlining need = 60”/6 × 3128 /36 + 10% = 955
Yard’s or 9.5 Roll
Style: P18-0470P
Suppose, For 6 pcs body’s need:
Interlining
length (by Marker) = 20”
If Total
Quantity = 3280 pcs
Than Total interlining need = 20”/6 × 3280 /36 + 10% = 334
Yard’s or 3.5 Roll
Cost = Total Roll × Price per Roll
Button size calculation:
1
inches = 40 ligne = 2.54 cm
1
ligne = 0.635 mm
12
pcs = 1 dozen,
12 dozen = 1 gross,
12 gross = 1 GG
1 GG = 1728 pcs (GG means Great Gross)
Now find out ligne of a button with 10 mm Dia?
Answer: 10 ÷ 0.635 = 15.75 ligne or 16 L (L refers to ligne or
ligner)
(Formula: button dia in mm ÷ 0.635= button ligne)
To calculate button measurement
follow below formula to get the button liner;
Button liner = Button diameter
(mm) x 1/0.635
Find
the below example with details;
Suppose, button dia is 15 MM
then what will be the button liner?
Solution:
Button liner = Button Dia /
0.635
=
15MM / 0.635
=
24 L
For 15 mm dia button, we found
button size 24L. Using above formula, we can calculate any button measurement
for garments item.
Suppose:
A shirt has 6 buttons, total order quantity 3456 pcs, find out total button
quantity for the order.
Answer: 6 × 3456 ÷ 1728 = 12 GG.
(Formula: number of
buttons per product × order quantity ÷ 1728) (1 GG = 1728 pcs)
Find out the button line/ligne with
simple example:
Formula: Button ligne = Button Dia in mm / 0.635 or Button Dia in mm X 1 /
0.635
Q.1: Suppose, Button length (dia) is
8 mm, Now figure out the button ligne for 8mm?
Solution:
Button Ligne = Button Dia in mm / 0.635
=
8 / 0.635
=
12.59 ligne = 12 L [ L = Ligne ]
Q.2: Find out the button ligne for
12mm button dia?
Solution:
Button Ligne = Button dia in mm X 1 / 0.635
=
12 X 1 / 0.635
=
18.897 ligne
=
18 L
[ L = Ligne ]
Q.3: Shirt has 6 buttons, order
quantity total 4320 pcs. Now find out total button quantity in GG?
Solution:
Button quantity in GG = per shirt button X total quanty / 1728
= 6 X 4320 / 1728
[ 1 GG = 1728 pcs ]
= 15 GG
Note: We need to additional quantity (minimum 5%) in case of
shortage due to defective or damage in bulk production.
Sewing Thread Calculation:
Total Sewing inch × Average sewing thread per
inch (22.5”) = Total sewing thread (inch)
Total sewing thread (inch) ÷ 39.37 = Sewing
Thread (Total Metter)
{Sewing Thread (Total Metter) + 15%
Sewing wastage} ÷ 3800 = Total cones.
→ Machine wise sewing thread consumption/inch
|
|||
S.L
|
Machine Name
|
Classification
|
Thread consumption/inch
|
1
|
plain m/c
|
1 needle
|
2.5 inch
|
2
|
plain m/c
|
2 needle
|
5 inch
|
3
|
over lock
|
3 thread
|
13.25 inch
|
4
|
over lock
|
4 thread
|
16.75 inch
|
5
|
over lock
|
5 thread
|
18.75 inch
|
6
|
flat lock
|
3 thread
|
16.75 inch
|
7
|
flat lock
|
5 thread
|
22.25 inch
|
8
|
Bar tack stitching
|
Per operation
|
Generally 7 inch
|
9
|
Button hole
stitching
|
Per Hole
|
Generally 7 inch
|
10
|
Button Attaching (2
hole)
|
Per button
|
3 inch
|
11
|
Feed of the ARM
|
1 needle
|
7 inch
|
12
|
Kanchai Stitching
|
1 needle
|
7 inch
|
13
|
Back Tape Stitching
|
1 needle
|
7 inch
|
→ Approx sewing thread consumption of different items
|
||
S.L
|
Product name
|
Consumption
|
1
|
Basic tshirt
|
125 meter
|
2
|
Basic polo shirt
|
175 meter
|
3
|
Tank top
|
50 meter
|
4
|
Fleece/Sherpa jacket
|
250 meter
|
5
|
Kids/girls dresses
|
300-450 meter
|
6
|
basic long sleeve woven shirt
|
150 meter
|
7
|
Basic short sleeve woven shirt
|
125 meter
|
8
|
basic long trouser / pant
|
350 meter
|
Some conversion unit-
Centimeter সেন্টিমিটার
|
Inch ইঞ্চি
|
Parameters:
|
10 mm = 1 cm
100 cm = 1 mtr
100 cm = 39.37" inch
1 cm = 0.3937 inch
1 CM = 0.0328 Foot
1" inch = 2.54 cm
1 Square Inch = 6.45 Square CM
12 inch = 1 Foot
36 inch = 1 Yard
1 Meter = 39.37 inch
1 Mtr = 100 cm = 1000
mm = 0.001 km
1 Meter = 3.28 Foot
1 Mtr = 1.09361 Yard
1 Yard = 0.9144 meter
1 YD = 36 inch
1 YD = 3 Foot
92 FT = 12
Yard
1 Foot = 0.3048 Meter
1 Foot = 30.48 cm
1 gm. = 0.0353 oz.
1 oz. = 28.350 gm.
1 lb. = 453.6 gm.
1 lb. = 0.4536 kg
1 m2 = 1.1960 yd2
1 yd2 = 0.8361 m2
|
1"
= 8 সুতা =1.0"
1.5 সুতা = 3/16" 1/8 = 1 সুতা = 0.125" 2.5 সুতা = 5/16" 1/4 = 2 সুতা = 0.25" 3.5 সুতা = 7/16" 3/8 = 3 সুতা = 0.375" 4.5 সুতা = 9/16" 1/2 = 4 সুতা =0.5" 5.5 সুতা = 11/16" 5/8 = 5 সুতা =0.625" 6.5 সুতা = 13/16" 3/4 = 6 সুতা = 0.75" 7.5 সুতা = 15/16" 7/8 = 7 সুতা = 0.875 1/16 = হাফ (1/2) সুতা = 0.0625 1/32 = পোয়া সুতা = 0.03125 Measurement Tape 60" inch = 150 cm = 1.5 miters
1 gm./m2 = 0.0295 oz./yd2
1 oz./yd2 = 33.91 gm./m2
1 kg = 2.2046 lb.
1 m/kg = 0.4961 yd./lb.
1 yd./lb. = 2.0159 m/kg |
M=Meter
MM=Mile Meter
Inc=Inch
YD=Yards
FT=Feet
KM=Kilo Meter
CM = Centimeter
1 CBF = 1728
square inches
1 CBM = 10,00,000 square cm
|
Some Important Conversion Factors:
1 Yard =
0.9144 meter
1 meter =
1.09361 yard
1 meter =
39.37 inch
1 gm. =
0.0353 oz.
1 oz. =
28.350 gm.
1 lb. =
453.6 gm.
1 lb. =
0.4536 kg
1 inch = 2.54 cm
|
1 m2
= 1.1960 yd2
1 yd2
= 0.8361 m2
1 gm./m2
= 0.0295 oz./yd2
1 oz./yd2
= 33.91 gm./m2
1 kg =
2.2046 lb.
1 m/kg =
0.4961 yd./lb.
1 yd./lb.
= 2.0159 m/kg
|
ØØ
Prove the equation:
è1 Yard =
0.9144 meter ç
We know
1
yard = 36 inch
1
meter = 39.37 inch
Here,
1 yard = 36 ÷ 39.37 = 0.9144 meter (Proved)
è1 meter =
1.09361 yard ç
We know
1
yard = 36 inch
1
meter = 39.37 inch
Here,
1 meter = 39.37 ÷ 36 = 1.09361 yard (Proved)
è1 meter = 39.37 inch ç
è1 gm =
0.0353 oz ç
è1 oz =
28.350 gm ç
è1 lb =
453.6 gm ç
è1 lb =
0.4536 kg ç
è1 inch =
2.54 cm ç
è1 m2
= 1.1960 yd2 ç
We know,
1
meter = 1.09361 yds
Here,
1 m2 = yds. × yds.
=
1.09361 yd × 1.09361 yd
=
1.1960 yds2 (proved)
è1 yd2
= 0.8361 m2 ç
We know,
1
yard = 0.9144 meter
Here,
1 yd2 = meter × meter
=
0.9144 × 0.9144
=
0.8361 m2 (proved)
|
è1 gm/m2
= 0.0295 oz/yd2 ç
We know,
1
gm = 0.0353 oz
1 m2
= 1.1960 yd2
Here,
1 gm/m2 = 0.0353 ÷ 1.196 = 0.0295
oz/yd2 (proved)
è1 oz/yd2
= 33.91 gm/m2 ç
We know,
1
oz = 28.35 gram
1
meter = 1.09361 inch
Here,
1 oz/yd2 = 1 oz × meter × meter
= 28.35 × 1.09361 × 1.09361
= 33.9061 gm/m2 (proved)
è1 kg =
2.2046 lb ç
We know,
1
kg = 1000 gram
1
lb = 453.6 gm
Here,
1 kg = 1000 ÷ 453.6 = 2.2046 lbs (proved)
è1 m/kg =
0.4961 yd/lb ç
We know,
1
yard = 0.9144 meter
1
lb = 0.4536 kg
Here,
1 m/kg = 0.4536 ÷ 0.9144 = 0.4961 yd/lbs (proved)
è1 yd/lb =
2.0159 m/kg ç
We know,
1
yard = 0.9144 meter
1
lb = 0.4536 kg
Here,
1 yd/lb = 0.9144 ÷ 0.4536 = 2.0159 m/kg (proved)
|
How to Select Yarn Count by
specific GSM:
S.L
|
Fabric Type
|
Normal Fabric
|
Lycra Fabric
|
1.
|
Single
Jersey
|
4320/GSM=YARN
COUNT
|
4320/GSM +
Lycra Deniar % = Yarn Count
|
2.
|
Double
Jersey
|
6000/GSM=YARN
COUNT
|
6000/GSM +
Lycra Deniar % = Yarn Count
|
3.
|
Pique
|
5200/GSM=YARN
COUNT
|
5200/GSM + Deniar %
=YARN COUNT [Note:Always use half(1/2)
Feeder ]
|
4.
|
Lacost
|
5300/GSM=YARN
COUNT
|
5300/GSM +20% Deniar =
YARN COUNT
|
5.
|
Double
Lacost
|
5720/GSM=YARN
COUNT
|
In Double Lacost is not
possible add Lycra
|
6.
|
Interlock
|
7200/GSM=YARN
COUNT
|
7200/GSM + 40% Deniar =
YARN COUNT
|
7.
|
Fleece
|
7200
× 2/GSM=YARN COUNT
|
7200 × 2/GSM +
Lycra Deniar % = Yarn Count
|
8.
|
1 × 1 RIB
|
5400/GSM=YARN
COUNT
|
5400/GSM +
Lycra Deniar % = Yarn Count
|
9.
|
2 × 2 RIB
|
6250/GSM=YARN
COUNT
|
6250/GSM +
Lycra Deniar % = Yarn Count
|
10.
|
Terry
|
6240/GSM=YARN
COUNT
|
|
11.
|
Polyester
|
5315/GSM=YARN
COUNT
|
CM Calculation for Knit
Garments:
In apparel industry, cost
of making (CM) is an important factor for garment merchandisers. As its
importance in garments industry, every merchandiser should know the actual
calculation method of it. Otherwise, factory may fall in huge loss.
Full
abbreviation of CM is Cost of Manufacture. In garments industries, CM means
cost of manufacturing for 12 garments. We must focus in below information
to calculate CM (cost of manufacturing)-
·
Total monthly expenditure
(electricity bill, rent, water bill, transportation, commercial cost, worker
& stuff wages etc.) of the factory.
·
Total running machine of
the following month
·
Total no of machine
quantity to complete the layout of mentioned order items.
·
Daily (8 hours/day)
production target of the mention order items (excluding alter & reject).
·
Total working days of the
following month.
·
Dollar conversation rate
(if expenditure amount is rather then US dollar)
Suppose,
·
Total monthly factory
expense- 70,00,000 BDT
·
Total running machine of
the following month is - 180 machines
·
Total working days of the
following month- 26 days
·
Daily factory expense:
70,00,000 / 26 = 269,230.77 BDT (Formula: total month factory expenses /
total working days of the following month)
·
Daily expense of 1 machine:
269,230.77 / 180 = 1495.73 BDT (Formula: daily factory expense / total
running machine of the following month )
·
Total machine quantity to
complete the layout - 18 machines
·
Daily cost of the mention
order item's layout: 18 X 1495.73 = 26,923 BDT (Formula: machine quantity to
complete layout X daily expenditure for 1 machine )
·
Hourly production quantity
of following mention order layout - 200 pcs
·
Normal daily working
hours- 8 hours
·
So, daily production of
the following layout: 200 X 8 = 1600 pcs (Formula: hourly production of the
layout X daily working hours )
·
Cost of Manufacture for 1
pcs: 26,923 / 1600 = 16.83 BDT (Formula: daily cost of the layout /
daily production of the layout )
·
So, CM (Cost of
Manufacture for 12 garments ): 16.83 X 12 = 202 BDT (Formula: manufacturing
cost for 1 pcs X 12 )
·
Dollar conversion rate:
1USD = 78 BDT
·
So, CM (Cost of
Manufacture for 12 garments ): 202 / 78 = US $2.5897
·
Need to add 20-25% profit.
So, after 20% added: $ 2.5897 + 0.5179 = 3.11 $ US
·
So, Final CM = $ 3.11
US
CM (Cost of Making):
Formula:
Overhead machine cost X require machine / production quantity × 12
= Monthly factory expenditure of following month / Total working days of
the month / total running machine of the following month X Number of machine to
complete the layout / Production quantity of the following layout × 12 / US
dollar Rate
= 70,00,000
/ 26 / 180 X 18 / 1800 X 12
= 1495.73
X 18 / 1800 X 12
=
14.96 X 12
=
179.49
=
$2.30 /dzn [ 1$
= 78 BDT]
Another
Simple example of CM (Cost of Manufacture):
After
starting the new salary of Bangladesh, we calculate the CM of any items
consider the overhead sewing machine cost of 1200 BDT to 1400 BDT per day. For
compliance factory we calculate per day overhead sewing machine cost of 1800
BDT to 2100 BDT.
Q. Suppose, A compliance factory per
day overhead of sewing machine is 2100 BDT. Total machine quantity to complete
the layout- 18 machines. Daily production comes from one existing layout- 1800
pcs. Dollar conversion rate is 1$ = 78 BDT. Now find out the CM for 12 pcs
garments?
Solution:
CM cost = Overhead of sewing machine cost X
total require machine to complete the layout / production quantity X 12
= 2100 X 18 / 1800 X 12
= 21 X 12
= 252 BDT
= $ 3.23 / dzn
[ 1$ = 78 BDT ]
How to calculate Net
weight & Gross weight per carton ….
→
When we calculate Net weight & Gross weight we follow the below rules:
1. Take a style
see the consumption,
2. Total fabric
consumption (Kg) - 15% = Actual fabric kg
3. Actual fabric
kg ÷ Order Quantity = Net weight per body
4. Per body Net
weight × Total body in per carton = Total Net weight per carton
5. Per body net
weight + Hanger weight (Accessories) = Per body Gross weinght
6. Per body
Gross weinght × Total body in per carton + Per empty carton weight = Gross weight per carton.
7. Gross weight per carton × Total
carton = Total Gross weight
Per
empty carton weight:
☼ If
carton measurement is: 60 cm × 40 cm × 20 cm = 1 kg
☼ If
carton measurement is: 20 cm × 20 cm × 15 cm = 800 gram
☼ এর নিচে হলে 500 বা 600 গ্রাম ধরতে হবে ।
Knitting Production calculation shortcut Formula:
(0.00, 00,005934 × Number of Needle × Number of Feeder × Stitch
Length × RPM × 60) ÷ Yarn count. = Production (kg)
Suppose Example:
Number of Needle = 2400
Number of Feeder = 96
Stitch Length = 2.85"
Cylinder RPM = 26
Time = 60 Minute
Yarn count = 26/1
(0.0000005934 × 2400 × 96 × 2.85 × 26 × 60) ÷ 26 = 23.38 kg
==================================================================================================
1. Line Labor Productivity:
2. Line Machine Productivity:
3. Line Efficiency:
4. Theoretical Manpower:
5. Target:
6. Standard Pitch Time (S.P.T) = Basic Pitch Time
(B.P.T) + Allowances (%)
7. GSD
GSD = (Man power × Work hour) / Target
8. SMV
SMV = Basic time + (Basic time × Allowance)
9. Basic time
Basic time = Observed time × Rating
10. Observed time
Observed time = Total Cycle time / No of cycle
11. Rating
Rating = (Observed Rating × Standard rating) / Standard rating
12. Earn minute
Earn minute = No of Pc’s (Production) × Garments SMV
13. Available minute
Available minute = Work hour × Manpower
14. Organization Efficiency
Organization Efficiency = (Basic pis time / Bottle neck time) × 100
15. Basic pis time (BPT)
Basic pis time = Total GMT SMV / Total Manpower
16. UCL
UCL = Basic pis time / Organization Efficiency
17. LCL
LCL = 2 × Basic pis time – UCL
18. Capacity
Capacity = 60 / Capacity time in minute
19. Cycle Time
Cycle Time = 60 / Team target
20. Capacity Achievable
Capacity Achievable = Capacity × Balance
21. Daily output
Daily output = Work hour / SMV
22. Factory capacity
Factory capacity = (Work hour / SMV) × Total worker × Working day ×
Efficiency
23. CPM
CPM = (Total over head cost of the month / No of SMV earners Work minutes) × Efficiency
24. Required no of operator
Required no of operator = Target daily output / Daily output per operator
25. Efficiency
Efficiency = (Earn minute × Available minute) × 100
Why
10,000,000 is needed in centimeter based consumption?
The below post has written by a reader of this blog. Thanks.
Frequently people ask why use 10000000 in consumption formula??
The basic formula per piece is = L x W x 2 / 10000 × GSM / 1000
L= Body & sleeve length with allowance
W= Chest measurement with allowance
W= Chest measurement with allowance
2= as each garment have two part
10000= is a big question?? See we get fabric area by
using basic formula but we need to know how much fabric is required in kgs?
Usually we know GSM (grams per square meter) so we’ve to convert
the fabric into square meter. 1m=100cm,
1sqr meter=10000 cm (100cm x 100cm), so divide fabric area by
10000. So now we get fabric in Sqr meter.
*GSM= multiplying by GSM we get total grams of fabric
1000= why 1000? Now it’s simple. We have total grams of fabric and dividing 1000
we get kgs. 1kg =1000 gram.
People commonly divide by 100000000 (10000×1000) to get fabric
in kgs.
Hope it make you clear- Pls let me ask if anything unclear.
What is 1550 in consumption
formula at inch?
1 meter
× 1 meter = squire meter
1 meter = 39.37 inches
39.37 x 39.37= 1550 inches
1550 is for "inch to meter" converter
1m= 39.37".
1 meter = 39.37 inches
39.37 x 39.37= 1550 inches
1550 is for "inch to meter" converter
1m= 39.37".
