Hi amc. It works like a bar chart. For every minute a job is running, an 'X' is printed. For every minute it is not running, a space is printed. You can compare the lines to see when jobs are running at the same time. So, if you have one row returned where the 'X's line up vertically with the lines above or below it, then it means the jobs were running concurrently.

Hope that helps,

Martin