Distribution resource planning (DRP) is used to develop a tiered inventory replenishment plan for all levels of the supply chain. The DRP system provides information that identifies requirement dates, replenishment dates, and order dates for material requirements. This information can be unified within the distribution system to provide a set of numbers to be used by everyone (Swamidass, P. M., 2000).

Provides the basis for linking the physical distribution system with the manufacturing planning and control system..

The calculation of needs in DRP is based on the application of MRP concepts to distribution, so that each center issues its orders to those at the higher level sufficiently in advance so that they are received in the appropriate quantity and time.

This technique performs a gross to net requirements calculation of demand and supply in each time period. When demand exceeds supply, the system generates a planned replenishment order and alerts the planner that a replenishment action is required to avoid stockouts. The complexity caused by distributed supply and demand relationships has a great impact on plan development, and resource uncertainty is one of the most important factors that should be seriously considered in the optimization of the problem (Lin, Wen-Huang, Shou-Ju and Wei Wang). To implement and put into operation a DRP system, training is required for all personnel involved in the development of the system, from senior management to plant operators. In addition, high management commitment must be achieved.

The main functions of the DRP are; planning and issuing supply orders placed; based on a master scheduling system, follow-up of supply orders; with which it aims to control the orders that are on the way between the supply warehouse and the reception warehouse, allocation of supplies; when there is a shortage of an item within the distribution network, planning the quantity of shipments; The DRP module also takes into account the capacity limitations that different distribution centers may encounter.

As we already know, the MRP determines when and how much to ask for and the DRP gives an answer; In addition, where to maintain the inventory, so that the final result (depending on the company's objectives) is the most appropriate (Domínguez Machuca, 1995).

Although simple, DRP can be an effective tool, especially for complex multi-level distribution systems. Such systems typically include one or more layers of intermediate distribution centers..

The main advantage of DRP over traditional ROP (Reorder Point) is that they can address changing demand patterns. However, while the ROP clearly incorporates uncertainty in demand (i.e., forecast error), the DRP does not. DRP is very similar to MRP in its concept and execution. In order for a DRP system to meet the objective for which it is developed, it is necessary that the information taken into account be as accurate and reliable as possible; Such information has to do with the aspects used in each part of the process (Nahmias Steven, 2007).

Distribution resource planning (DRP) is used to develop a tiered inventory replenishment plan for all levels of the supply chain. The DRP system provides information that identifies requirement dates, replenishment dates, and order dates for material requirements. This information can be unified within the distribution system to provide a set of numbers to be used by everyone (Swamidass, P. M., 2000).

Provides the basis for linking the physical distribution system with the manufacturing planning and control system..

The calculation of needs in DRP is based on the application of MRP concepts to distribution, so that each center issues its orders to those at the higher level sufficiently in advance so that they are received in the appropriate quantity and time.

This technique performs a gross to net requirements calculation of demand and supply in each time period. When demand exceeds supply, the system generates a planned replenishment order and alerts the planner that a replenishment action is required to avoid stockouts. The complexity caused by distributed supply and demand relationships has a great impact on plan development, and resource uncertainty is one of the most important factors that should be seriously considered in the optimization of the problem (Lin, Wen-Huang, Shou-Ju and Wei Wang). To implement and put into operation a DRP system, training is required for all personnel involved in the development of the system, from senior management to plant operators. In addition, high management commitment must be achieved.

The main functions of the DRP are; planning and issuing supply orders placed; based on a master scheduling system, follow-up of supply orders; with which it aims to control the orders that are on the way between the supply warehouse and the reception warehouse, allocation of supplies; when there is a shortage of an item within the distribution network, planning the quantity of shipments; The DRP module also takes into account the capacity limitations that different distribution centers may encounter.

As we already know, the MRP determines when and how much to ask for and the DRP gives an answer; In addition, where to maintain the inventory, so that the final result (depending on the company's objectives) is the most appropriate (Domínguez Machuca, 1995).

Although simple, DRP can be an effective tool, especially for complex multi-level distribution systems. Such systems typically include one or more layers of intermediate distribution centers..

The main advantage of DRP over traditional ROP (Reorder Point) is that they can address changing demand patterns. However, while the ROP clearly incorporates uncertainty in demand (i.e., forecast error), the DRP does not. DRP is very similar to MRP in its concept and execution. In order for a DRP system to meet the objective for which it is developed, it is necessary that the information taken into account be as accurate and reliable as possible; Such information has to do with the aspects used in each part of the process (Nahmias Steven, 2007).