Custom MRP Element

Hello all,

I wanna ask to all the PP Expert here 😊

There is a custom MRP Element in my SAP R3 system. This is a setting that I never known before. The setting must be done by my ex colleague here. I'm asked by my manager to check, where the setting was done, and write a document of it. You can view the custom MRP element in my image below.

So, PP Expert, where can I find the setting for that custom MRP Element?

Thank you all!!!