The calculation logic of "MRP_HORIZON_IN_DAYS"

Hello,

We take the Site Date + Mrp Horizon in Days => and that becomes the Mrp Horizon. So, in this calculation neither manufacturing calendar nor distribution calendar is involved. 

On thing that is good to consider is how long your acummulated lead times you have for your MRP-planned part. Let say say you have a customer order line demand 100 days from now and the accumulated lead time is 110 days for the part in question. Let say you basically have nothing in stock for intermediate sub-assemblies and components, then if you use a 90 day MRP horizon, MRP will not load this “driving” demand, and hence MRP will not explode it down through the BOM.

So you need to be a little bit careful.

MRP Horizon is very useful when you have a long forecast horizon in Master Scheduling (MS), coz you might want to do long term planning in MS, but you get way too much data into MRP engine if you explode let say “the 12 months master scheduling horizon”.

Hope this helps :-)

****

Code-wise it looks like this in pseudo code:

“IF the order due date <= mrp_horizon_date THEN
    Mrp_Part_Supply_Demand_API.New()

ELSE

    Ignore this future demand/supply

END IF;”

***

Best Regards,

Mats

Thank you so much!!!

​@majose I  was searching topics related to my issue and found this very insightful.  I have some questions.

where can I find site set up  in IFS ? I need to under stand how many days set up for MRP Horizon  for my site?

Hello ​@IFSFAN 

With MRP Horizon in Date you set a constraint how far out in the future you will consider open demands (like customer order line demand) and open supplies. (The field description should also tell the users that this field is also valid for open supply as well - not only demands.)

The idea behind this field/functionality can be spelled like this: PERFORMANCE

If you don’t have problem with MRP performance then there is no reason to enter an MRP Horizon. Please read the comments in the thread above.

Also, please note that if you schedule your MRP job, then MRP Horizon in Days field shows up instead. Same functionality. 

Hope this helps,

-Mats

​Hello ​@majose thank you for your feedback.  We not yet moved to Cloud but during the perform Site MRP  I do not see the option about Horizon,    Not sure where else I can find it?

​@IFSFAN the MRP horizon was introduced in Cloud 22R1. It is not available in earlier versions.

Hello ​@matt.watters   Unfortunately the issue has not resolved yet  . So people not using cloud yet where should they look for planning horizon days?