EPC (Event-driven Process Chain) diagrams illustrate business process work flows and are an important component of the SAP R/3 modeling concepts for business engineering. EPC diagrams use graphical symbols to show the control-flow structure of a business process as a chain of events and functions. Using the EPC Diagram template in Microsoft Office Visio, you can quickly and easily create a high-level, visual model of your business process.

The building blocks used in EPC diagrams are:

• Functions, which are the basic building blocks of the diagram. Each function corresponds to an executed activity.
• Events, which occur before or after a function is executed or both. Functions are linked by events.
• Connectors, which associate activities and events. There are three types of connectors: AND, OR, and exclusive OR (XOR).

After it is completed, you can use the EPC diagram as a reference for modeling the SAP R/3 system.

Create an EPC diagram

1. On the File menu, point to New, point to Business, and then click EPC Diagram.
2. From EPC Diagram Shapes, drag the shapes that you want to represent your business process onto the drawing page.
3. Connect the shapes:
   1. Drag a shape from a stencil onto the drawing page and position it near another shape.

      

   2. While still holding down the mouse button, move the pointer over one of the blue triangles. The triangle turns dark blue.

      

   3. Release the mouse button. The shape is placed on the drawing page, and a connector is added and glued to both shapes.

      

       Tip   To reverse the direction of the arrow on a connector, on the Shape menu, point to Operations, and then click Reverse Ends.

4. To add text to a shape, select it, and then type. When you finish typing, click outside the text block.

 Notes 

• To edit text, double-click the shape, place the cursor where you want to change the text, and then type.
• To hyperlink a shape to supporting or explanatory documents, select the shape, and then on the Insert menu, click Hyperlinks.
• To align multiple shapes vertically or horizontally, select the shapes you want to align, and then on the Shape menu, click Align.
• To distribute three or more shapes at regular intervals, select the shapes, and then on the Shape menu, click Distribute.