Computer-Aided-Process-Planning3.ppt

7/28/2019 Computer-Aided-Process-Planning3.ppt

1/25

Computer Aided Process

Planning


2/25

What is CAPP


3/25

Process Plan


4/25

Process Planning


5/25

Basic Process in developing a

process plan


6/25

Process Planning Approaches

Manual Systems

Computer Aids

Variant System

Experimental Generative System


7/25

Manually Prepared Process

Plans


8/25

Computer Aids


9/25

Variant (Retrieval) CAPP

Methodology


10/25

Variant CAPP


11/25

Variant CAPP


12/25


13/25

Variant CAPP


14/25

Generative CAPP

Methodology


15/25

Knowledge based process

planning


16/25

Kendall & Kendall 9-16

Decision Tables

A table of rows and columns, separatedinto four quadrants

Conditions

Condition alternatives

Actions to be taken

Rules for executing the actions


17/25


Figure 9.8 The standard formatused for presenting a decision table


18/25


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


19/25


Figure 9.10 Constructing a decision table for decidingwhich catalog to send to customers who order only fromselected catalogs


20/25


Checking for Completeness and

Accuracy Four main problems

Incompleteness

Impossible situations

Contradictions

Redundancy


21/25


Figure 9.14 Checking the decision table forinadvertent contradictions and redundancy is

important


22/25


23/25

Types of Decision Table


24/25


25/25

Documents

Computer-Aided-Process-Planning3.ppt