Product Blend Example • Petroleum Mix Inputs Maximum Barrels Available/Day 4,500 2,700 3,500 Petroleum Mix Products Component 1 2 3 Cost/Barrel $12 10 14

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Product Blend Example
Petroleum Mix Inputs
Component
1
2
3
Petroleum Mix Products
Component
Specifications
Grade
Super
Premium
Maximum Barrels
Available/Day
4,500
2,700
3,500
Extra
At least 50% of 1
Not more than 30% of 2
At least 40% of 1
Not more than 25% of 3
At least 60% of 1
At least 10% of 2
Cost/Barrel
$12
10
14
Selling
Price/Barrel
$23
20
18
• Produce at least 3,000 Barrels of each grade.
Transcribed Image Text:Product Blend Example Petroleum Mix Inputs Component 1 2 3 Petroleum Mix Products Component Specifications Grade Super Premium Maximum Barrels Available/Day 4,500 2,700 3,500 Extra At least 50% of 1 Not more than 30% of 2 At least 40% of 1 Not more than 25% of 3 At least 60% of 1 At least 10% of 2 Cost/Barrel $12 10 14 Selling Price/Barrel $23 20 18 • Produce at least 3,000 Barrels of each grade.
Looking back at the Product Blend Example, what would the constraint look like if you needed at
least 45% of "Super" Grade to be Component #2?
Remember, xij = barrels of component i used in motor oil grade j per day,
where i = 1, 2, 3 and j = s (super), p (premium), and e (extra).
So, X1e is the number of barrels of Component #1 used in the Extra grade oil, per day.
0.45x25 -0.55x15 - 0.55x35 ² 0.0
0.7x1e - 0.3x2e - 0.3x3e ≥ 0.0
0.55x2s - 0.45x15 -0.45x35 ≤ 0.45
0.55x25 -0.45x15 -0.45X35 ²0.0
Transcribed Image Text:Looking back at the Product Blend Example, what would the constraint look like if you needed at least 45% of "Super" Grade to be Component #2? Remember, xij = barrels of component i used in motor oil grade j per day, where i = 1, 2, 3 and j = s (super), p (premium), and e (extra). So, X1e is the number of barrels of Component #1 used in the Extra grade oil, per day. 0.45x25 -0.55x15 - 0.55x35 ² 0.0 0.7x1e - 0.3x2e - 0.3x3e ≥ 0.0 0.55x2s - 0.45x15 -0.45x35 ≤ 0.45 0.55x25 -0.45x15 -0.45X35 ²0.0
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