Реферат: Mrp Ii Essay Research Paper MRP IIWhile

Mrp Ii Essay, Research Paper

MRP II

While MRP I primarily address the inbound flow of inventory (materials management), MRP II adds other interfaces such as finance, marketing, and integrated logistics. Like MRP I, MRP II is a push inventory model which pushes product through manufacturing and distribution processes in order to meet forecast demand. However, it adds further dimensions to the basic model. MRP II not only considers the inbound flow of material, but also how much material can actually be handle within the plant. Furthermore, it actually handles production scheduling, labour needs, inventory budgets, and personnel needs. But the most important feature is the addition of the finance interface. This module provides the capability of transforming the operating production plans into financial terms, consequently the data can be used for financial planning and control purposes of a more general management nature. Another significant addition is the simulation module. This simulation capability enables management to perform a more comprehensive alternative planing work in developing the marketing and business plans. Operating variable could be regulated to examine the systemwide response to the proposed operating change.

Besides MRP II includes the entire set of activities involved in the planning and control of production operations. It consists of a variety of functions of modules and includes production planing, resource requirement planning, master production scheduling, materials requirements planning (MRP I), shop floor control, and purchasing.

Process of MRP II

Step 1 – Market Demand; the process begins with an aggregation demand from all sources. Examples of sources are firms orders, forecasts, and safety stock requirements.

Step 2- Production Plan; with inputs from manufacturing, finance, and marketing, the production plan would be derived.

Step 3- Rough-cut capacity planning; it involves short-term capacity considerations that are affected by irregularities in demand. It formulates benchmarks for the proper use of personnel, machines, and shifts. Bills of capacity and bills of labour resources are the primary inputs to determine rough-cut capacity. In the event of incapability in producing the require output (due to limitation of capacity), adjustment to the production plan would be made.

Step 4- Master production schedule; formulation of the master production schedules provides a realistic, detailed, statement of what the firm expects. It is more detail than the aggregate plan, it translates the aggregate plan into specific numbers of specific products to be produced in a specific period of time.

Step 5- Material requirements planning (MRP); MRP is the heart of the entire process (MRP II). When MRP comes into play, material and schedule requirements would be generated.

Step 6- Capacity requirements planning; at this stage, the capacity requirement planning determine whether the firm has enough capacity (e.g. worker, space, money) to meet the schedules. Again, if schedules could not be met, some adjustment in the master production schedule would be required else requirements would be scheduled.

Advantages of MRP II

The advantages of MRP II includes:

- Improved consistency in one-time customer delivery

- Reduction in purchasing cost due to fewer expedited shipments

- Fewer shortage and stockouts

- Increase customer service level

- Inventory reduction of one-fourth to one-third (cost reduced)

- Higher inventory turnover

- Improve responsiveness to demand changes

- Allowing more planning flexibility

- Minimization of workforce overtime

Problems in Implementation of MRP II

Implementation an MRP II system is a monumental effort. The system requires a tremendous amount of information, which must be accurate if the system is to be successful. The MRP II systems is capable of affecting all function within Forges s marketing, production, purchasing, accounting, finance and logistic. All personnel who have any interaction with the MRP II system require training. Further, Forges must be committed to make the MRP II system work. The problems that occur in implementing MRP are frequently organizational and behavioral rather than technical.

Existing Systems and the Informal System

If an MRP II system is replacing an existing production and inventory control system, Forges may see significant resistance to change, even if the existing system has been unsatisfactory. People generally resist to change, and they prefer the familiar to the unfamiliar. Also, when a system performs poorly, an informal system develops to deal with problems.

Information Requirements

For MRP II to operate effectively, the company must have a large amount of timely and accurate data. Besides, bill of material must be developed for all items. Furthermore, all the bill of material (BOM) must be reviewed, updated, and structured that provide the data needed by MRP II. This would not be a simple task. Frequency product changes and modification can make the process of developing a BOM challenging. To maintain the integrity of the BOM, the company must practice effective configuration control, that is, the company must control and coordinate changes to its products to ensure a smooth changeover to new product designs. After a system is installed, careful attention and discipline must be exercised to ensure at all data used by the system is accurate. For example, if a clerk is supposed to enter a code 3, indicating that the item is purchase in thousands, but instead enters code 1, indicating that it is purchase in dozens, serious error and material shortages are likely to occur. If a system gives erroneous data at times, people may develop other way to get the data they need and may no longer bother to update the system, since they no longer use it. The system could then become even less reliable and be a burden rather then a benefit.

Inventory Control

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