Demand Driven Material Requirements Planning (DDMRP)

Material Planning and Execution Software that ensures you have enough inventory without having too much


Protected Flow Manufacturing (PFM) and Demand Driven MRP (DDMRP) are embed

Protected Flow Manufacturing (PFM)

Ensures that you’re always working on the right job/work order at the right time shop-wide and at every work center/department.

Adding Demand Driven MRP (DDMRP) to PFM

Ensures that you always have enough inventory – finished goods, subassemblies, and purchased items – but never too much.

If your company does a combination of Make-to-Order and Make-to-Stock, PFM and Demand Driven MRP work together to protect both committed due-dates and inventory availability. PFM with DDMRP balances priorities between MTS and MTO work so that actual customer commitments are protected against delays due to false signals to replenish stock items.


What is DDMRP?

(Demand Driven Material Requirements Planning)

It’s Material Planning and Execution for the 21st Century!

Using historical, current, and future-looking demand information, DDMRP creates a unique “planning
buffer” for each part. The planning buffer is like a shock-absorber for each stock position; On one
hand, it stops you from ordering too much, and on the other, it triggers replenishment orders when
waiting any longer would put that position at risk of running out. This way, you always have enough
on hand, but never too much.


Stop Guessing!

DDMRP eliminates the guesswork in planning for materials.


It’s Simple, and it Works!

  • Actual usage triggers replenishment recommendations, not forecasts. This eliminates the constant correction of pulling in or pushing out MRP-generated orders planners deal with on a weekly basis.
  • Eliminates the timing guessing-game. MRP’s goal is to time supply / demand to end up with zero inventory. This often results in having to de-expedite orders that MRP told you to expedite previously. DDMRP’s goal is to have enough inventory on hand and on order all the time.
  • Planning buffers are dynamic – they flex over time as your actual demand changes always ensuring that you have enough, but never too much, even when demand is far from consistent.

LillyWorks ERP and Protected Flow Manufacturing™ have both been certified as DDMRP Compliant by the Demand Driven Institute (DDI), which was co-founded by Carol Ptak and Chad Smith, the authors of Demand Driven Material Requirements Planning.


LillyWorks DDMRP has been certified as DDMRP Compliant by the Demand Driven Institute (DDI), which was co-founded by Carol Ptak and Chad Smith, the authors of Demand Driven Material Requirements Planning.

You can get the book at: DDMRP by Ptak and Smith on Amazon

You can learn more about DDMRP at: www.demanddrivenmrp.com