Calling Up the Input/Output Diagrams 
Prerequisites
The input/output diagram for a work center is only displayed if the relevant order data is updated in the shop floor information system. You can control updating independently of the order category, for example in Customizing for production orders under Defining order-dependent parameters.
You can find detailed information on the shop floor information system in the documentation
LO – Logistics Information System.
Procedure
In capacity evaluation, choose Environment → Input/output diagram
Result
The system displays input/output diagrams for all the work centers selected.
If you double-click on the curve a Gantt diagram is displayed in which the orders for the work center are listed according to their dates.