How the "demand" in mrp_det record created?

Hi All,

I got some issued we cannot see "Gross Reqs" in some FG items in 23.14 report.
And I think "Gross Reqs" in 23.14 report is the "demand" in mrp_det.

I want to verify how is "demand" record come.

Do you have any idea please share?

Thank you