The WIP Summary report has a summary and detail format to show everything in WIP for a specific project or all projects. You can change the "As Of" date if you need to find out what was in WIP at some point in the past. You can also choose a start/end date to just show what was in WIP during a specified period of time. By default we include all WIP accounts but you can select a specific account if needed. This report is used in the month end close process to tie out your PJA GL balance. 
