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Chapter: Mechanical : Computer Integrated Manufacturing : Components of CIM

Important Questions and Answers: Components of CIM

Mechanical - Computer Integrated Manufacturing - Components of CIM




1. CIM


Computer-integrated manufacturing (CIM) is the manufacturing approach of using computers to control the entire production process.


CIM is the integration of the total manufacturing enterprise through the use of integrated systems and data communication coupled with new managerial philosophies that improve organizational and personnel efficiency.


Computer integrated manufacturing is defined as the effective use of computers to design the products, plan the production ,control the operations and perform the various business related functions needed in a manufacturing firm.


2. What is the main objective of CIM?


·        The main aim of CIM is to use the advanced information processing technology into all areas of manufacturing industry in order


·        To make the total process more productive and efficient;


·        increase product reliability;


·        Decrease the cost of production and maintenance relating to the manufacturing system as well as to the product; and


·        Reduce the number of hazardous jobs and


3.   Automation.


Automation may be defined as the process of having machines follow a predetermined sequence of operations with little or no human labor, using specialized equipment and devices that perform and control manufacturing processes.


4. ‘Islands of automation


The individually automated workstations or processes are called islands of automation. In other words the term ‘islands of automation’ represents the various


technologies that facilitate manufacturing automation in isolation, without having integrated with other manufacturing technologies.



5. Difference between CAD, CAM AND CIM


·        CAD/CAM involves the use of computers to make Design and Manufacturing more profitable.


·        Parts of CIM use CAD/CAM techniques and products to try and make the factory fully connected using computers.


·        The essential difference is CAD/CAM provides the tools, CIM is the philosophy which is used when organizing the computers, programs, etc. and all the information that flows between them.


·        CIM focuses on connecting the various CAD/CAM modules.


6. Computer-aided technologies


·        Computer-aided technologies (CAx) is a broad term that means the use of computer technology to aid in the design, analysis, and manufacture of products.


·        Advanced CAx tools merge many different aspects of the product lifecycle management (PLM), including design, finite element analysis (FEA), manufacturing, production planning, product


·        Computer-aided design (CAD)


·        Computer-aided engineering (CAE)


·        Computer-aided industrial design (CAID)


·        Computer-aided manufacturing (CAM)


·        Computer-aided requirements capture (CAR)


·        Computer-aided rule definition (CARD)


·        Computer-aided rule execution (CARE)


·        Computer-aided software engineering (CASE)


·        Computer-assisted surgery (CAS)


·        Computer-aided surgical simulation (CASS)


·        Computational fluid dynamics (CFD)


·        Component information system (CIS)


·        Computer-integrated manufacturing (CIM)


7. CIM system Hardware & Software.


·        CIM Hardware consists of manufacturing equipments and Computer related hard ware with the office equipment.


·        CIM Software consists of computer programs to carry out the various functions and transfer the data from various areas of the industry.



8.CIM Wheel or CIM Components:

Distinct components of CIM wheel


·        Manufacturing / Human resource management


·        Marketing


·        Strategic planning


·        Finance


·        Product and process design and planning


·        Manufacturing planning and control


·        Factory automation


9.   Computer communication network in CIM


Communication in the nervous systems of CIM and this is an integral part of CIM.


·        The development in communication / network engineering have made implement of CIM easier that before.


10.            What are the various communication needs of CIM?

·        The information need for manufacturing in a company requires as follows.


·        Person-to-person, computer-to-computer, machine-to-machine, person to computer or computer to person, person to machine or machine to person, computer to machine or machine to computer


11.            What are the fundamental needs of computer communications?

·        Data: entities that convey meaning


·        Information: the content or interpretation of data


·        Signals: electric or electromagnetic encoding of data


·        Signaling: the act of propagating the signal along a medium


·        Transmission: propagating of data by processing of signals


12.            What are the nine major elements of CIM systems?


Marketing, Product design, Planning, Purchase, Manufacturing engineering, Factory automation hardware, warehousing, finance, and Information management


13.            Data Transmission Methods.

·        Serious & Parallel Communications.


·        Synchronous & Asynchronous methods.


·        Simplex & Duplex methods.


15. Types of Computer networks


The computer networks can be classified into four categories depending upon the physical separations of the communication devices.


·        Miniature - <50m


·        Small - <500m


·        Medium - <1km


·        Large - >1km  - WAN & LAN.


16.            Local Area Network;


Local Area Network is intended to serve a number of users who are physically located close together.


17. Wide Area Network;


Wide Area Network more like to telephone network, tying different people in different buildings, cities or even countries.


18. Network Topologies.


There are several commonly used network topology or ways of routing the interconnections. It classified as Star, Ring, Bus topologies.


19. Seven Layers of OSI model.


The protocol layers are;


1.     Physical layer,


2.     Data link layer,


3.     Network layer,


4.     Transport layer,


5.     Session layer,


6.     Presentation layer,


7.     Application layer.


20. Components of LAN;

The various components of LAN are listed below;


·        Computers,


·        Network interface card,


·        Network cable,


·        Network server,


·        Central mass storage.



·        The data base can be defined as a collection data in a single location defined to be used by different programmers for a variety of applications.


·        The database of a company will include data required for various departments like design, purchase, manufacturing technology, personnel, marketing and sales, finance inventory etc.


22.            Differentiate data and information.

The data refers to the value stored in the database and information to the meaning as understood by the user.


23. Network Topologies.


There are several commonly used network topology or ways of routing the interconnections. It classified as Star, Ring, Bus topologies.


Star network communications


The star network consists of a central control station to which each of the individual devices or user stations are connected. To send messages from one workstation to the other is through the central station.



Ring network communication


In ring network communication the individual stations are connected in a continuous ring .Each station has a neighboring station on either side. To communicate from one station to other, the message must be relayed from station to station until it finally arrives at its designated destination station.

Bus network communication


The bus network consists of a single main transmission line to which the individual devices are attached. Any device or station can communicate with any other device in the network by sending its message through the bus with the address of the desired recipient.



Reasons for having database for the company


·        Redundancy can be reduced


·        Inconsistency can be avoided


·        The data can be shared


·        Standards can be enforced


·        Security restrictions can be applied


·        Integrity can be maintained


·        Conflicting requirements can be balanced


Different types of design data related to CIM


·        Standards-national, international, trade or company standards


·        Material specifications and properties


·        Design theories and rules of thumb.


·        Data based on experience


·        Test results of products and proto types


·        Service feedback


·        Results of analysis of the product


·        Data’s on competitor’s product.


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