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Computer Integrated Manufacturing (CIM) Overview: Motivation, Implementation, Operation
Scott J. Anson, Ph.D., P.E.PLTW Affiliate Professor
Assistant ProfessorRochester Institute of Technology
April 2007
Thanks to Prof. James Rehg providing some slide material
Introduction
The phrase computer-integrated manufacturing (CIM) was coined by Dr. J. Harrington, Jr. in 1973.
He argued for an integrated approach to the enterprise and against highly fragmented manufacturing operations that lead to localized optimization.
What is the primary goal of a business?
Motivation
To make $!!!
Recommended reading- “The Goal” by
Eliyahu M. Goldratt and Jeff Cox. Copyright 1984
Motivation
Motivation The ultimate goal of the enterprise is to develop an internal
strategy that raises manufacturing performance to a level higher than that of the competition.
Individual automation cells were and early attempt at increasing profitability.
Motivation
Early automation attempts often failed to support this goal (making $) for three reasons-
1) Automated cells were isolated from the rest of the production system – no data connectivity or poor material flow
2) Deficiencies in the work-cell design process – Engineers often design a cell to copy the manual tasks including copying poor production practices
3) Insufficient training and preparation of people to set up and maintain the systems – training is both technical and cultural (mind set)
Implementation
Failures in early automation implementation lead to the development of CIM (Computer Integrated Manufacturing) which has as much to do with corporate culture as with electron flow and digital logic.
Implementation
Definition:
CIM- The integration of the total manufacturing enterprise though the use of integrated systems and data communications coupled with new managerial philosophies that improve organization and personnel efficiency.
As defined my Computer and Automation Systems Association (CASA) of the Society of Manufacturing Engineers (SME)
Implementation
The implementation of CIM system takes three steps Assessment
The organization is studied to determine strengths and weaknesses
Simplification A simplification process is applied to eliminate all waste from
the manufacturing area(s) to be automated Implementation
The acquisition and implementation of the hardware and software for the production cells or manufacturing systems
Implementation – Critical Requirements for Effective CIM Implementation
Teamwork Total quality Improved productivity Reduced waste/ Lean Manufacturing Continuous improvements Common databases Respect and consideration for all ideas regardless of the level of
the organization from which they are initiated
Operation – Major Elements of CIM
Operation – The 1985 CIM Wheel
The Society of Manufacturing Engineers (SME) CIM wheel provides a portrayal of relationships among all parts of an enterprise
Operation – The 1993 SME Enterprise Wheel
The Society of Manufacturing Engineers (SME) 1985 CIM wheel developed into the 1993 Enterprise Wheel
CIM Summary
Since CIM involves both hardware and business philosophies, there are many different aspects to CIM, and one organizations CIM system might differ substantially from another’s and both can still be CIM
CIM Summary
CIM is the modern way of manufacturing.
Therefore, for Engineers to speak of “Computer Integrated Manufacturing” is almost redundant since the Computer Integrated part is obvious.
Some college level programs are beginning to avoid the term “CIM” because it has been accepted as the only proper way to manufacture.
This does not undermine the validity of the term “CIM” but rather validates it.