I have two Custom lists "Master" & "Scoring", I want a column within my "Scoring" list called "Total Score" to automatically populate a column in my Master list called "Issue Scoring" using the Issue ID in each list as a link.. Is this possible and how do you do it?
If there is a one-to-one relationship (i.e. one scoring entry for each master entry) it is easy. A workflow running on scoring item changes can update master list by looking up with Issue ID.
If there are multiple entries on Scoring list that needs to be summed, you then need to create a workflow with a loop on item change. Slightly more complicated, following link explains how to do it: