TCS® approval In integrated HCL® Marketing Operations and HCL Campaign systems, campaign project templates can require TCS® (target cell spreadsheet) approval before flowcharts run in production mode. If Approval Required is selected on the template, then all rows of the TCS must to be approved before the flowchart can run in production mode. If you run the flowchart in production mode and one or more rows on the TCS associated with this flowchart are not approved, Campaign generates an error.