WinCC OA Reporting 10 clients, expands one WinCC OA server by 10 Reporting interfaces for 10 active connections (clients) Evaluation von WinCC OA data via a third- party tool such as BIRT, CRYSTAL Reports or MS EXCEL. (in the WinCC OA Version 3.13, the previous Excel report is still supported and automatically supplied with the WinCC OA Reporting option.)