three distinct principles: the dependence of demand, the netting of inventory and the expected receipt of open orders such as on-hand inventory, and time phasing (i.e. lead times). These three items are very important to the proper use of an MRP system. They are the foundations for the implementation of the MRP system. For example, the dependence upon demand is very important in the MRP model. Demand is varied in any type of business, but with a surplus of available inventory to meet the demand it would eliminate the loss of customers. Also, the use of an MRP model helps to determine w would link the various departments so that interaction between the organization's departments would become necessary.
             Externally, (SCM, or supply chain management) the company would have to begin to see their suppliers, distributors, and retailers as partners instead of separate entities. By doing this, an organization would not only be able to access inventory easier, but they would be able to track their shipments easier. With the use of this model, companies can begin to eliminate unneeded time and money that would not be considered value-added processes.
             The major problems with these two models are that it takes a lot of organization internally and externally. For example, if a supplier is not willing to share their trade secrets or is unwilling to go through the process of incorporating an ERP system into their productions, then the system may not work effectively. Another problem with this model is that it would require extensive trainin
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