Raw Materials and Resources 8/24/04 Paul A. Jensen Operations Research Models and Methods Copyright 2004 - All rights reserved

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

Raw Material Parameters and Variables

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

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

Machines require Resources

Resource Parameters and Variables

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

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

For multiple products Each product has its own process chart

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

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