The Significance of Planning Data for Negative Days and Positive Days in Microsoft Dynamics AX

One of the more confusing aspects of planning data within Microsoft Dynamics AX involves the significance of the policies for negative days and positive days.  The names of these two policies reflect the mathematics within the planning calculations, but the names do not readily convey their significance.  Understanding and correctly applying these policies directly impacts the generation of planned orders for an item, and the overall effectiveness of using Dynamics AX to model your business decisions. 


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About Scott Hamilton

Scott Hamilton has consulted globally with several hundred manufacturing/distribution companies on SCM and ERP issues. His publications include multiple books about SCM using Dynamics AX as well as two textbooks about SCM/ERP, and his books have been translated into Portuguese, Russian, Chinese and Japanese. For more than 10 years, Scott has been a frequent speaker at Microsoft and AXUG conferences around the world, and a multi-year winner of the rarely given Microsoft MVP award for Dynamics AX. His regular column “The AX Solution Architect” is published in

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