Test 3

Question 1

what is a FMS?

Answer 1

a FMS is a highly automated GT Cell, consisting of a group of processing workstations, interconnected by an automated material handling and storage system, and controlled by a distributed computer system

Question 2

what makes a system a FMS?

Answer 2

• automation
• flexibility capabilities (identify and distinguish between different incoming parts, quick changeover of operating instructions, quick changeover of physical setup)

Question 3

FMS Flexibility Criteria

Answer 3

• part variety test
• schedule change test
• error recovery test
• new part test

Question 4

Objective of FMS part type selection problem

Answer 4

• objective is to load the FMS to maximize savings achieved by producing parts in the FMS subject to FMS capability constraints
• typically, the part type selection problem is solved infrequently

Question 5

Principle of optimality

Answer 5

• applied to part type selection problem

- given a stage and state, the optimal decision form that point on is independent of how you got to that state

Question 6

assumptions of part type selection problem

Answer 6

• either all or none of a product is produced in FMS
• there is a single, key, bottleneck resource and that the other resources have sufficient capacity to handle any configuration of parts
• pi’s are independent of the parts selected

Question 7

Group Technology

Answer 7

• parts are classified, and parts with similar features are processed together with standardized processes
• setup reduction
• design similarity
• manufacturing/process similarity

Question 8

Coding

Answer 8

Coding is a process of establishing symbols to be used for meaningful communication and applying these symbols to specific parts

Question 9

Classification

Answer 9

Classification is a separate process in which items are separated into groups based on the existence or absence of characteristic attributes

Question 10

Coding vs. Classification

Answer 10

Coding can be used for classification, and classification requirements must be used when developing a coding scheme

Question 11

developing a coding scheme

Answer 11

• the scope of the part types to be coded must be known and the code must be able to discriminate between parts with different values for key attributes
• unambiguous and complete - perfectly clear and formally defined

Question 12

Optiz code

Answer 12

• hybrid code structure
• 5 digit “geometric form” code
• 4 digit “supplementary code”
• optional company specific “secondary code”

Question 13

What is PFA

Answer 13

• method for identifying part families and associated machine groupings that uses the information contained on production route sheets rather than part drawings

Question 14

PFA Steps

Answer 14

• data collection
• sortation of process routings
• PFA chart
• cluster analysis

Question 15

2 things were interested in in Rank Order Clustering

Answer 15

• exceptional elements: elements that are not part of a cluster
• voids: when a part doesn’t use a certain machine within a cluster