In this lesson, you will use the ATP_Check Action Project, which is already available in the lobby. This project leverages a service developed using ABAP to validate the availability of a requested material in the specified quantity. The service checks inventory and supply data and provides a response confirming whether the requested quantity can be fulfilled.
Select the Sales Order Processing artifact.

The process begins with an API trigger, which will later be initiated by the application created using SAP Build Apps.

Select (+) icon after the trigger to add a step to the process.

Select Action followed by Browse All Actions.

In the Browse library page, find the Action project Add new entity to ATPCheck and select Add.

In the General tab, look for the Destination Variable and select + Create Destination Variable in the drop down.

A dialog opens to create a destination variable. Enter the following value and select Create.
| Input Field | Input Value |
|---|---|
| Identifier | ATPcheck |

Select the Inputs tab and configure the inputs section with the following fields
| Form Input Fields | Process Content Entry |
|---|---|
| Material | material |
| Quantity | quantity |

Select the Condition operator in the process editor and select Open Condition Editor to modify the condition.

Change the branch condition value to:
OverallStatus - is equal to - available
Apply the changes.
