Computer Integrated Manufacturing Case Study

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Data collection and information availability plays an important role in manufacturing environment. The advances in computing technology can be applied to collect the data and utilize it as useful information to act in real time.
The levels of an Enterprise respond as the information is sent and received from one level to other level for further proceedings. It is important that correct information reaches correct place in correct time so that the responsiveness of the whole system can be improved.
The advantages which are provided by an MES system are numerous. It provides improved visibility, improved inventory management, reduction in paper work, reduction in scrap rate which ultimately improves product quality and throughput. It is a
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Initially computer systems were used for accounting and finance related activities. Few decades earlier, Information Technology is applied to assist the production, through on-line management of the activities at the plant floor by help of computers. The approach of using computers to control the production process is named as Computer Integrated Manufacturing and its main aim is to manage the exchange of information faster. CIM can be used in any manufacturing industry to perform various activities throughout the enterprise.
There are many subsystems of Computer Integrated Manufacturing which help in integration of the manufacturing process from ideation to application. Few Computer Aided Techniques are Computer Aided Design (CAD), Computer Aided Process Planning (CAPP), Computer Aided Quality Assurance (CAQ), Enterprise Resource Planning (ERP), Product Lifecycle Management (PLM) and Manufacturing Execution System (MES). The devices which help in implementing an integrated manufacturing system are Computer Numeric Controlled machine (CNC), Direct Numeric Control Machines (DNC), Programmable Logic Controllers (PLC), and Monitoring Equipment. The system should be capable of not only storing data but also to act in real
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Level 4 performs the following major functions: capacity planning, plant production scheduling, materials requirements planning, and all manufacturing related purchasing. It determines the optimum inventory levels of raw materials, energy sources, spare parts, and of in-process goods.
The adoption of MES has increased as companies realize MES is used to evaluate and manage production activities using the latest technologies to support traceability, monitoring, and management of shop floor activities.
MES is located between Business Layer and the Control Layer of the PERA model. ERP (Enterprise Resource Planning), PLM (Product Lifecycle Management) and AMS (Asset Management System) are there in the Business Layer to take care of financial functions, customer orders, Bill of Material, Asset Maintenance and send production requests to the factory floor. MES provides monitoring, control and management of the factory floor, and provide updated information to the Business Layer.
Figure 3.2 Functionalities of different layers of an

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