Difference between Problem Report & Quality Issue

Hi Team - I need some clarification between Quality issue and Problem Report.

Q1) What exactly is the difference between them and when we should raise what? Could you please explain that?

Q2) Again when we raise Quality issue, within that we are getting a type as "Problem Report - item" and "Problem Report - Supplier", What does they mean? How are they different from "Problem Report"? And when we will raise Quality issue -> Problem report - item and Quality issue -> problem report - supplier ?

Thanks

Deepak.