Warehouse location
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Transcript of Warehouse location
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Navneet DwivediPGDM-Operations and Supply Chain
Warehouse location: Centre
of Gravity
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It includes answering few fundamental questions like:◦How many facilities should be there
◦Where should they be located◦What size should they be
Warehouse Location : a strategic business decision
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Manufacturing (Plant or warehouse): decisions are driven by economies. Trade off between transportation cost, inventory carrying cost, labour cost, taxes etc.
Retail: decisions are driven by revenue. Traffic flow and resulting revenue are primary location factor.
Service: decision are driven by service factors. Response time, accessibility and availability.
Nature of location analysis
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1. Factor Rating Method
2. Centre of Gravity Method
Single Facility Location
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Factor Rating MethodFactors
Weightage(1 to 10)
Score(out of 10)
Weighted Score(weightage*score)
Proximity to competing stores 8Space rent/lease considerations 5Parking space 8Proximity to complementary stores 7Modernity of store space 6Customer accessibility 9Local taxes 3Community service 3Proximity to major transportation 8
Total Score
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The centre of gravity (COG) or weighted centre technique is a quantitative method for locating a facility such as warehouse, at the centre of movement in a geographic area based on weight and distance.
Centre of Gravity Method
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COG in general…
COG
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Determining the volumes by source and destination point
Determining the transportation costs based on Rs/unit/km
Overlaying a grid to determine the coordinates of source and/or destination points
Finding the weighted centre of gravity for the graph
COG method involves
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1
4
2
3
g
x
y𝑋𝑔=
𝑥1𝑤1+𝑥 2𝑤2+𝑥 3𝑤3+𝑥 4𝑤 4𝑤 1+𝑤2+𝑤3+𝑤4
𝑌𝑔=𝑦1𝑤1+𝑦 2𝑤2+ 𝑦3𝑤 3+𝑦 4𝑤 4
𝑤1+𝑤 2+𝑤3+𝑤 4
COG= G(Xg, Yg)0,0
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Point PRODUCTS LOCATION RATE @ (Rs/Unit/Kg) Xi Yi VOLUME
S1 A MUMBAI 9 2.5 4 8000S2 B DELHI 9 3.5 6.5 10000H1 A & B JAIPUR 8 2.75 5.5 5000H2 A & B VISAKHAPATNAM 7 5 4.25 3000H3 A & B CHENNAI 8 3 1.5 6000H4 A & B GUWAHATI 9 7.5 5.5 4000
Example:Suppose a regional medical warehouse is to be established to serve several hospitals throughout the country. The supplies originate at S1 and S2 and are destined for hospitals at H1,H2,H3and H4. The relative locations are given below.
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2 3 4 5 6 7 80
1
2
3
4
5
6
7
8
9
10
S2
S1
H1
H2
H4
H3
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Point RATE @ (Rs/Unit/Kg) Xi Yi VOLUME Wi Xi*Wi Yi*Wi
S1 ₹ 9.00 2.5 4 8000 ₹ 72,000.00 180000 288000
S2 ₹ 9.00 3.5 6.5 10000 ₹ 90,000.00 315000 585000
H1 ₹ 8.00 2.75 5.5 5000 ₹ 40,000.00 110000 220000
H2 ₹ 7.00 5 4.25 3000 ₹ 21,000.00 105000 89250
H3 ₹ 8.00 3 1.5 6000 ₹ 48,000.00 144000 72000
H4 ₹ 9.00 7.5 5.5 4000 ₹ 36,000.00 270000 198000
Total ₹ 3,07,000.00 1124000 1452250
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Xg=
= =3.66
Yg=
= =4.73
COG = (Xg,Yg) = (3.66,4.73)
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2 3 4 5 6 7 80
1
2
3
4
5
6
7
8
9
10
S2
S1
H1
H2
H4
H3
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