Demand Driven MRP - The future of MRP

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Supply Chain have undergone 40 years of mutations

The business world evolved since the 1970 :

  • Supply Chains are now constituted of large networks of actors;
  • Products' lifespan decreased;
  • Clients demand increasingly low delays;
  • Products are more customized and diversified;
  • But numerous parts require long replenishment delays (distant suppliers)
  • etc.

Companies have to cope with increasing complexity and uncertainty as they face the same symptomatic hurdles: delivery delays, shortages, long lead times, permanent stage of emergency, unreliable previsions, etc.

However, companies continue to use a 40 year-old material requirement systems known as MRP (Material Requirement Planning), though all the problems mentioned above put forward that MRP is no longer adapted to this "New Normality".

Demand Driven MRP, or DDMRP, an adequate response to the "New Normality" Challenge 

Time had come for a new alternative to emerge in order to satisfy the requirement supply chains must fullfil, and Demand Driven Material Requirement Planning (DDMRP) has many qualities to adapt Supply Chain Management to the 21st century.

The DDMRP methodology combines principles coming from MRP, Lean, Theory of Constraints and 6 Sigma, and is deployed following a 5 steps process:

1. Strategic inventory postioning: which items should be stocked? DDMRP takes into account 6 factore to define what should be stocked. One of the most important concepts is "decoupling". It consists in positioning inventory adequately to decouple the client's demand and the supply process : the different items do not concern a particular order. DDMRP is based on the idea that inventory is not only a liability but sometimes an asset: when positioned on the right place at the right moment they enable to avoid the propagation of variability throughout the supply chain, to manage production and orders, and to ensure a minimum lead time;

Bimodal Distribution - DDMRPThis picture illustrates the fact that too often supply chains hold too little or too much inventory, while DDMRP enables to stock the adequate quantity.

2. Buffer profiles and levels : Define the right size of the buffers (divided into 3 zones: green, yellow and red), that's to say the levels of inventory or margins required in function of replenishment delays, variability and minimum order quantity for instance.

3. Dynamic adjustments, redefine the size of the buffers regularly.

4.  Demand Driven Planning: anticipate inventory levels according to current supply orders, current inventory and actual ordrers over a specified period, so that new supply orders are generated appropriately.

5. Demand Driven Execution: Order and Produce in function of items' availability. Priority definition is facilitated and collaboration is encouraged. DDMRP favors on-going improvement.

5 components of DDMRPThe 5 steps of the DDMRP operation process




According to the Demand Driven Institute, the Demand Driven MRP method enabled to obtain the following results :

  • OTD increases by about +100%.
  • Lead Times reduction: -80%
  • Inventory reduction : -30% to -45%
  • Supply Chain Cost reduction : reducing costly expediting (airlift, partial shipment, etc...)


Marris Consulting can realize a 2-day diagnosis of your Supply Chain or of your production. so:

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