Math Problem Statement
Each day, the production manager is faced with the problem of how many of two types of products to produce. The manager’s goal is to maximize profits, but, at the same time, no existing customer orders should go unfilled. Based on the following information, how many of each product should the manager produce today?
Product Aluminum required (pounds) Steel required (pounds) Profit per unit Customer orders A 6 3 7 5 B 5 3 12 3 Current inventory of aluminum – 72 pounds
Current inventory of steel – 93 pounds
Note: Non-integer quantities for both products are allowed. Round your answer to one decimal place.
Solution
To solve this optimization problem, we’ll set up a linear programming model.
Step 1: Define the Variables
Let:
- = quantity of product A to produce.
- = quantity of product B to produce.
Step 2: Set Up the Objective Function
The goal is to maximize the profit, which is given by:
Step 3: Set Up the Constraints
-
Material Constraints (Aluminum and Steel):
- Aluminum: Each unit of A requires 6 pounds, and each unit of B requires 5 pounds. The total aluminum used should not exceed 72 pounds:
- Steel: Each unit of A requires 3 pounds, and each unit of B requires 3 pounds. The total steel used should not exceed 93 pounds:
-
Demand Constraints:
- The production of A should at least meet the customer orders for A (5 units):
- The production of B should at least meet the customer orders for B (3 units):
-
Non-negativity:
Step 4: Solve the Linear Program
The linear programming problem is as follows:
Maximize:
Subject to:
Let’s solve this using an optimization tool.The optimal solution is to produce:
- 5 units of product A
- 8.4 units of product B
This will result in a maximum profit of 135.8.
Would you like more details or have any questions?
Here are 5 related questions for further exploration:
- How would a change in aluminum or steel inventory affect production decisions?
- What if customer demand constraints were relaxed—would profit increase?
- How could this model be adapted if only integer quantities were allowed?
- What impact does an increase in profit per unit of product B have on production?
- How would additional products impact the formulation of this linear program?
Tip: In linear programming, always confirm constraints are realistic to ensure practical solutions.
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Math Problem Analysis
Mathematical Concepts
Linear Programming
Optimization
Inequalities
Profit Maximization
Formulas
Profit = 7x + 12y
6x + 5y <= 72
3x + 3y <= 93
x >= 5
y >= 3
Theorems
Linear Programming Theorem
Suitable Grade Level
Grades 11-12
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