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Computer Aided Process Planning

Computer Aided Process Planning. What is CAPP. Process Plan. Process Planning. Basic Process in developing a process plan. Process Planning Approaches. Manual Systems Computer Aids Variant System Experimental Generative System. Manually Prepared Process Plans. Computer Aids.

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Computer Aided Process Planning

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  1. Computer Aided Process Planning

  2. What is CAPP

  3. Process Plan

  4. Process Planning

  5. Basic Process in developing a process plan

  6. Process Planning Approaches • Manual Systems • Computer Aids • Variant System • Experimental Generative System

  7. Manually Prepared Process Plans

  8. Computer Aids

  9. Variant (Retrieval) CAPP Methodology

  10. Variant CAPP

  11. Variant CAPP

  12. Variant CAPP

  13. Generative CAPP Methodology

  14. Knowledge based process planning

  15. Decision Tables • A table of rows and columns, separated into four quadrants • Conditions • Condition alternatives • Actions to be taken • Rules for executing the actions

  16. Figure 9.8 The standard format used for presenting a decision table

  17. Developing Decision Tables • Determine conditions that affect the decision • Determine possible actions that can be taken • Determine condition alternatives for each condition • Calculate the maximum number of columns in the decision table • Fill in the condition alternatives • Complete table by inserting an X where rules suggest actions • Combine rules where it is apparent • Check for impossible situations • Rearrange to make more understandable

  18. Figure 9.10 Constructing a decision table for deciding which catalog to send to customers who order only from selected catalogs

  19. Checking for Completeness and Accuracy • Four main problems • Incompleteness • Impossible situations • Contradictions • Redundancy

  20. Figure 9.14 Checking the decision table for inadvertent contradictions and redundancy is important

  21. Types of Decision Table

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