Class Presentation_Lecture notes_Production Systemspdf

© 2016 Pearson Education, Ltd. All rights reserved. This material is protected under all copyright laws as they currently exist.
No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher. For the exclusive use of adopters of the book
Automation, Production Systems, and Computer-Integrated Manufacturing, Fourth Edition, by Mikell P. Groover.
Ch 1 Introduction
Sections:
1. Production Systems
2. Automation in Production Systems
3. Manual Labor in Production Systems
4. Automation Principles and Strategies
5. About This Book

© 2016 Pearson Education, Ltd. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any
form or by any means, without permission in writing from the publisher. For the exclusive use of adopters of the book Automation, Production Systems, and Computer-Integrated
Manufacturing, Fourth Edition, by Mikell P. Groover.
Production System Defined
A collection of people, equipment, and procedures
organized to accomplish the manufacturing
operations of a company
Two categories:
 Facilities – the factory and equipment in the facility
and the way the facility is organized (plant layout)
 Manufacturing support systems – the procedures
used by a company to manage production and to
solve technical and logistics problems in ordering
materials, moving work through the factory, and
ensuring that products meet quality standards

The Production System

Production System Facilities
Facilities include the factory, production machines and
tooling, material handling equipment, inspection
equipment, and computer systems that control the
manufacturing operations
 Plant layout – the way the equipment is physically
arranged in the factory
 Manufacturing systems – logical groupings of
equipment and workers in the factory
 Production line
 Stand-alone workstation and worker

Manufacturing Systems
Three categories in terms of the human participation in the
processes performed by the manufacturing system:
1. Manual work system - a worker performing one or
more tasks without the aid of powered tools, but
sometimes using hand tools
2. Worker-machine system - a worker operating
powered equipment
3. Automated system - a process performed by a
machine without direct participation of a human

Categories of Manufacturing Systems
(a) Manual work system, (b) worker-machine system,
and (c) fully automated system

Manufacturing Support Systems
Manufacturing support involves a sequence of activities that
consists of four functions:
1. Business functions - sales and marketing, order entry,
cost accounting, customer billing
2. Product design - research and development, design
engineering, prototype shop
3. Manufacturing planning - process planning, production
planning, MRP, capacity planning
4. Manufacturing control - shop floor control, inventory
control, quality control

Sequence of Information-Processing
Activities in a Manufacturing Firm

Automation in Production Systems
Two categories of automation in the production system:
1. Automation of manufacturing systems in the
factory
2. Computerization of the manufacturing support
systems
 The two categories overlap because manufacturing
support systems are connected to the factory
manufacturing systems
 Computer-Integrated Manufacturing (CIM)

Computer Integrated Manufacturing

Automated Manufacturing Systems
Examples:
 Automated machine tools
 Transfer lines
 Automated assembly systems
 Industrial robots that perform processing or
assembly operations
 Automated material handling and storage systems to
integrate manufacturing operations
 Automatic inspection systems for quality control

Automated Manufacturing Systems
Three basic types:
1. Fixed automation
2. Programmable automation
3. Flexible automation

Fixed Automation
A manufacturing system in which the sequence of
processing (or assembly) operations is fixed by the
equipment configuration
Typical features:
 Suited to high production quantities
 High initial investment for custom-engineered equipment
 High production rates
 Relatively inflexible in accommodating product variety

Programmable Automation
A manufacturing system designed with the capability to
change the sequence of operations to accommodate
different product configurations
Typical features:
 High investment in general purpose equipment
 Lower production rates than fixed automation
 Flexibility to deal with variations and changes in
product configuration
 Most suitable for batch production
 Physical setup and part program must be changed
between jobs (batches)

Flexible Automation
An extension of programmable automation in which the
system is capable of changing over from one job to the
next with no lost time between jobs
Typical features:
 High investment for custom-engineered system
 Continuous production of variable mixes of products
 Medium production rates
 Flexibility to deal with soft product variety

Product Variety and Production
Quantity for Three Automation Types

Computerized Manufacturing
Support Systems
Objectives of automating the manufacturing support
systems:
 To reduce the manual and clerical effort in product
design, manufacturing planning and control, and the
business functions
 Integrates computer-aided design (CAD) and computer-
aided manufacturing (CAM) in CAD/CAM
 CIM includes CAD/CAM and the business functions of
the firm

Reasons for Automating
1. Increase labor productivity
2. Reduce labor cost
3. Mitigate the effects of labor shortages
4. Reduce or remove routine manual and clerical tasks
5. Improve worker safety
6. Improve product quality
7. Reduce manufacturing lead time
8. Accomplish what cannot be done manually
9. Avoid the high cost of not automating

Manual Labor in Production Systems
Is there a place for manual labor in the modern production
system?
 Answer: YES
 Two aspects:
1. Manual labor in factory operations
2. Labor in manufacturing support systems

Manual Labor in
Factory Operations
The long term trend is toward greater use of automated
systems to substitute for manual labor
 When is manual labor justified?
 Some countries have very low labor rates and
automation cannot be justified
 Task is technologically too difficult to automate
 Short product life cycle
 Customized product requires human flexibility
 To cope with ups and downs in demand
 To reduce risk of new product failure

Labor in Manufacturing
Support Systems
 Product designers who bring creativity to the design task
 Manufacturing engineers who
 Design the production equipment and tooling
 And plan the production methods and routings
 Equipment maintenance
 Programming and computer operation
 Engineering project work
 Plant management

Automation Principles and Strategies
1. The USA Principle
2. Ten Strategies for Automation and Process
Improvement
3. Automation Migration Strategy

U.S.A Principle
1. Understand the existing process
 Input/output analysis
 Value chain analysis
 Charting techniques and mathematical modeling
2. Simplify the process
 Reduce unnecessary steps and moves
3. Automate the process
 Ten strategies for automation and production
systems
 Automation migration strategy

Ten Strategies for Automation and
Process Improvement
1. Specialization of operations
2. Combined operations
3. Simultaneous operations
4. Integration of operations
5. Increased flexibility
6. Improved material handling and storage
7. On-line inspection
8. Process control and optimization
9. Plant operations control
10.Computer-integrated manufacturing

Automation Migration Strategy
For Introduction of New Products
1. Phase 1 – Manual production
 Single-station manned cells working independently
 Advantages: quick to set up, low-cost tooling
2. Phase 2 – Automated production
 Single-station automated cells operating
independently
 As demand grows and automation can be justified
3. Phase 3 – Automated integrated production
 Multi-station system with serial operations and
automated transfer of work units between stations

Automation Migration Strategy

About This Book
1. Overview of Manufacturing
2. Automation and Control Technologies
3. Material Handling and Identification Technologies
4. Manufacturing Systems
5. Quality Control Systems
6. Manufacturing Support Systems

Technological Categories of the
Production System

Class Presentation_Lecture notes_Production Systemspdf

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