1. Raw Materials and Resources
8/24/04
Paul A. Jensen
Operations Research Models and Methods
Copyright All rights reserved

2. Operations require raw materials
Unit
Raw Mat.
Flow
Req. 1
1.929
1kg. #3 2
1.736
--- 3
3.086
2kg. #2 4
1.389 5
5.879
3kg. #1 6
5.291 7
4.762 8
1.111 5 3 1

3. Raw Material Parameters and Variables

4. Raw material requirements depend on the unit flows
Raw material required per unit of product
The raw materials required for production V

5. Example: Compute the Raw Materials required
Say V = 100/week
Operation
Unit
Raw Mat.
Flow
Req. 1
1.929
1kg. #3 2
1.736
--- 3
3.086
2kg. #2 4
1.389 5
5.879
3kg. #1 6
5.291 7
4.762 8
1.111

6. Machines require Resources

7. Resource Parameters and Variables

8. The total resource requirements depend on
production
the machine time requirements
the numbers of machines

9. Example: Compute the Resources required
Say V = 100/week

10. For multiple products
Each product has its own process chart

11. The effects of multiple products are additive
Operations are implemented on machines
Operations require raw materials
Machines require resources

12. Summary: Flow Analysis
Given a process chart we compute unit flows and unit times
From unit times we compute machine time requirements and numbers
From unit flows we compute raw material requirements
From machine time requirements and numbers of machines we compute resource requirements