Operations require raw materials Operation 5 3 1 1 2 3 4 5 6 7 8 Unit Flow 1. 929 1. 736 3. 086 1. 389 5. 879 5. 291 4. 762 1. 111 Raw Mat. Req. 1 kg. #3 --2 kg. #2 --3 kg. #1 ------- 2
Raw Material Parameters and Variables 3
Raw material requirements depend on the unit flows n n Raw material required per unit of product The raw materials required for production V 4
Example: Compute the Raw Materials required n Say V = 100/week Operation 1 2 3 4 5 6 7 8 Unit Flow 1. 929 1. 736 3. 086 1. 389 5. 879 5. 291 4. 762 1. 111 Raw Mat. Req. 1 kg. #3 --2 kg. #2 --3 kg. #1 ------- 5
Machines require Resources 6
Resource Parameters and Variables 7
The total resource requirements depend on n production the machine time requirements the numbers of machines 8
Example: Compute the Resources required n Say V = 100/week 9
For multiple products n Each product has its own process chart 10
The effects of multiple products are additive n n n Operations are implemented on machines Operations require raw materials Machines require resources 11
Summary: Flow Analysis n n 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 12