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Solution of CS507 Assignment fall 2009

Q1. Why is Computer Integrated Manufacturing (CIM) very important to National Economy? & list down the benefits of CIM.

Computer Integrated Manufacturing (CIM).

Computer Integrated Manufacturing, known as CIM, is the phrase used to describe the complete automation of a manufacturing plant, with all processes functioning under computer control and digital information tying them together. Quite often it was mistaken for the concept of a "lights out" factory. It includes CAD/CAM, computer-aided design/computer-aided manufacturing, CAPP, computer-aided process planning, CNC, computer numerical control machine tools, DNC, direct numerical control machine tools, FMS, flexible machining systems, ASRS, automated storage and retrieval systems, AGV, automated guided vehicles, use of robotics and automated conveyance, computerized scheduling and production control, and a business system integrated by a common data base. Computer-Integrated Manufacturing (CIM) in engineering is a method of manufacturing in which the entire production process is controlled by computer. The traditionally separated process methods are joined through a computer by CIM.

Impact to national economy.

This integration allows the processes to exchange information with each other and enable them to initiate actions. Through this integration, manufacturing can be faster and with fewer errors. Yet, the main advantage is the ability to create automated manufacturing processes. Typically CIM relies on closed-loop control processes, based on real-time input from sensors. It is also known as flexible design and manufacturing .This technology contributes to several national economic prosperity goals. Its major contribution is to job creation and economic growth because it is an essential part of the new manufacturing infrastructure centered on computer- controlled manufacturing. For example, by contributing to reducibility and lower costs of "clean cars," CIM support software plays an important role in making clean cars more economically viable and giving U.S. industry advantage in the new generation of vehicles for world markets. It provides one of the tools which can be used to excel at the products and processes identified by the NEMI as essential for future competitiveness of U.S. electronics industry in world markets. It provides the capabilities to work with new materials tailored specifically to the needs of automotive, electronics, construction and aircraft industries, and is essential to the design and economic production of sophisticated new automobiles and aircraft. Finally, CIM support software contributes to the harnessing of information technology because many of the physical components of the information infrastructure, e.g., integrated circuits, can be manufactured more productively with reliance on CIM.

CIM implies that there are at least two computers exchanging information, e.g. the controller of a arm robot and a microcontroller of a CNC machine.
Some factors involved when considering a CIM implementation are the production volume, the experience of the company or personnel to make the integration, the level of the integration into the product itself and the integration of the production processes. CIM is most useful where a high level of ICT is used in the company or facility, such as CAD/CAM systems, the availability of process planning and its data. Although none of what this says is correct.
Computer-integrated manufacturing (CIM): It is the total integration of Computer Aided Design / Manufacturing and also other business operations and databases. It is concept/philosophy about the implementation of various integrated computer systems in factory automation. and Job Definition Format (JDF) are becoming increasingly beneficial to printing companies to streamline their production process.

The heart of computer integrated manufacturing is CAD/CAM. Computer-aided design (CAD) and computer-aided manufacturing (CAM) systems are essential to reducing cycle times in the organization. CAD/CAM is a high technology integrating tool between design and manufacturing. CAD techniques make use of group technology to create similar geometries for quick retrieval. Electronic files replace drawing rooms.
CIM benefit

According to the U.S. National Research Council, CIM improves production productivity by 40 to 70 percent, as well as enhances engineering productivity and quality. CIM can also decrease design costs by 15 to 30 percent, reduce overall lead time by 20 to 60 percent, and cut work-in-process inventory by 30 to 60 percent. Managers who use CIM believe that there is a direct relationship between the efficiency of information management and the efficiency and the overall effectiveness of the manufacturing enterprise. Flexible machining systems (FMS) are extensions of group technology and cellular manufacturing concepts. Using integrated CAD/CAM, parts can be designed and programmed in half the time it would normally take to do the engineering. The part programs can be downloaded to a CNC machining center under the control of an FMS host computer. The FMS host can schedule the CNC and the parts needed to perform the work. Just in time (JIT) – A Japanese idea that inventory is manufactured (or acquired) only as the need for it arises or in time to be sold (or used). A major goal is to cut down on inventory investment.

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