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Process Flow Analysis

Process Flow Analysis. Goldratt: Balance flow not capacity. Our Goal: For a single product. Given: the process design Given: operation time and scrap rates at each operation Given: product demand Find: The flow in each operation and the total time required for each operation.

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Process Flow Analysis

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  1. Process Flow Analysis Goldratt: Balance flow not capacity Paul A. Jensen Operations Research Models and Methods Copyright 2004 - All rights reserved

  2. Our Goal: For a single product • Given: the process design • Given: operation time and scrap rates at each operation • Given: product demand • Find: The flow in each operation and the total time required for each operation

  3. To construct a model you must know the process • The process is described by its operations

  4. The process model admits greater detail

  5. What happens to product flows at junctions? • Do they assemble? • Do they combine? • Do they mix? • Do they disassemble? • Do they separate? • Do they split?

  6. “And” nodes model flows that assemble • The flows are equal on all entering and leaving arcs

  7. “Or” nodes model flows that combine • The total flow in equals the total flow out

  8. “Proportionality” nodes model arbitrary combinations • Input and output proportions are given

  9. All junction nodes must be specified in a process chart

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