Definition of CIM“CIM is the integration of the totalmanufacturing enterprise through the useof integrated systems and datacommunications coupled with newmanagerial philosophies that improveorganizational and personnel efficiency.”Computer-integrated manufacturing (CIM)is the manufacturing approach ofusing computers to control the entireproduction process.
What is CIM?CIM is the integration of all enterprise operationsand activities around a common corporate datarepository.It is the use of integrated systems and datacommunications coupled with new managerialphilosophies.CIM is not a product that can be purchased andinstalled.It is a way of thinking and solving problems.This integration allows individual processes toexchange information with each other and initiateactions.
Potential Benefits of CIMImproved customer serviceImproved qualityShorter time to market with new productsShorter flow timeShorter vendor lead timeReduced inventory levelsImproved schedule performanceGreater flexibility and responsivenessImproved competitivenessLower total costShorter customer lead timeIncrease in manufacturing productivityDecrease in work-in process inventory
Role of Computer in ManufacturingThe computer has had a substantial impact onalmost all activities of a factory.The operation of a CIM system gives the usersubstantial benefits:Reduction of design costs by 15-30%;Reduction of the in-shop time of a part by 30-60%;Increase of productivity by 40-70%;Better product quality, reduction of scrap 20-50%.
Manufacturing MethodAs a method of manufacturing, three componentsdistinguish CIM from other manufacturingmethodologies:Means for data storage, retrieval, manipulation andpresentation;Mechanisms for sensing state and modifying processes;Algorithms for uniting the data processing componentwith the sensor/modification component.CIM is an example of the implementationof Information and Communication Technologies(ICTs)in manufacturing.
Key challengesThere are three major challenges for the development of a smoothlyoperating computer-integrated manufacturing system:Integration of components from different suppliers: Whendifferent machines, such as CNC, conveyors and robots, are usingdifferent communications protocols. In the case of AGVs (automatedguided vehicles), even differing lengths of time for charging thebatteries may cause problems.Data integrity: The higher the degree of automation, the morecritical is the integrity of the data used to control the machines.While the CIM system saves on labor of operating the machines, itrequires extra human labor in ensuring that there are propersafeguards for the data signals that are used to control the machines.Process control: Computers may be used to assist the humanoperators of the manufacturing facility, but there must always be acompetent engineer on hand to handle circumstances which couldnot be foreseen by the designers of the control software.
Subsystems in computer-integrated manufacturingCAD (Computer-Aided Design) involves the use ofcomputers to create design drawings and product models.CAE (Computer-Aided Engineering) is the broad usageof computer software to aid in engineering tasks .CAM (Computer-Aided Manufacturing) is the use ofcomputer software to control machine tools and relatedmachinery in the manufacturing of work pieces.CAPP (Computer-Aided Process Planning) is the use ofcomputer technology to aid in the process planning of apart or product, in manufacturing.
Cont…CAQ (Computer-Aided Quality Assurance) is theengineering application of computers and computercontrolled machines for the inspection of the quality ofproducts.PPC (Production Planning and Control) A production (ormanufacturing) planning and control (MPC) system isconcerned with planning and controlling all aspects ofmanufacturing, including materials, scheduling machines andpeople, and coordinating suppliers and customers.ERP (Enterprise Resource Planning) systems integrateinternal and external management information across anentire organization, embracing finance/accounting,manufacturing, and sales and services.
‘CIMOSA’ (Computer IntegratedManufacturing Open System Architecture)CIMOSA provides a solution for businessintegration with four types of products:The CIMOSA Enterprise Modeling Framework, whichprovides a reference architecture for enterprisearchitecture.CIMOSA IIS, a standard for physical and applicationintegration.CIMOSA Systems Life Cycle, is a life cycle model for CIMdevelopment and deployment.Inputs to standardization, basics for internationalstandard development.
Advantages Disadvantages Responsiveness to shorter Unfamiliar technologies product life cycles used. Better process control emphasizes product quality Requires major change in and uniformity. corporate culture. Supports and co-ordinates Reduction in short term exchange of information profit. Designs components for Perceived risk is high. machines. Decreases the cost of High maintenance cost and production and maintenance expensive implementation.
ConclusionComputer-integrated manufacturing (CIM) isthe manufacturing approach of using computers tocontrol the entire production process.This integration allows individual processes toexchange information with each other and initiateactions.Through the integration of computers,manufacturing can be faster and less error-prone,although the main advantage is the ability to createautomated manufacturing processes