Tutorial A2 q21-30

Question 1

What is process planning?

Answer 1

A function within a manufacturing facility that determines which processes are to be used to convert parts from their initial form into their final form based on engineering designs.
A Process Plan is then generated and used by schedulers and machine operators.

Question 2

What information is typically on a process plan?

Answer 2

• What features are to be manufactured
• What tools/machines are to be used
• The manufacturing time of each feature

Question 3

What are the main steps in process planning?

Answer 3

• Geometry analysis
• Raw material selection
• Process selection
• Process detailing
• Setup, fixture planning and design
• Process Plan analysis and evaluation

Question 4

What is Variant CAPP?

Answer 4

• Assume similar parts will have similar process plans
• Software used to identify similar parts
• Retrieve them and edit their plans to suit the requirements for each specific part
• Group Technology is adopted to group parts based on geometric or manufacturing similarities
• Can only modify existing plans.

Question 5

What does CAPP stand for?

Answer 5

Computer Aided Process Planning

Question 6

What is Generative CAPP?

Answer 6

Automatic synthesis of a plan for a new part rather than human decision making

• Plan is made by using information from a manufacturing process database
• Same procedure as Variant CAPP, just quicker
• Can generate completely new plans

Question 7

What is workflow?

Answer 7

A ‘sequence of tasks’ or ‘arrangement of processes’ that a product undergoes as it is made.
Each product that is manufactured has ‘flowed’ through a sequence of
production processes having ‘work’ performed on it.

Question 8

What are precedence diagrams used for?

Answer 8

They illustrate the workflow required to make a product and can help identify the
manufacturing lead time of a production process

Question 9

What is manufacturing lead time?

Answer 9

The total manufacturing time for a product from start to finish including all
processing time, setup time, waiting time, idle time etc

Question 10

What are relationship charts used for?

Answer 10

Analysing the plant layout in a manufacturing organisation to best locate
machines/departments based on criteria such as general material flow and safety

Question 11

What are travel charts used for?

Answer 11

They quantitatively illustrate the pattern and the amount of part movement between departments/machines to help with identifying the critical path in the production process