SAP TM BOPF Navigator -Transaction /SCMTMS/BONAV
SAP Transportation Management (TM) system includes various tools and interfaces, one of which is the Business Object Processing Framework (BOPF). The BOPF Navigator is a powerful tool that visualizes and manages the relationships between different business objects within SAP TM.llows Consultant to navigate between different business objects and explore how they interact with each other. This helps in analyzing the impact of changes in one object on others.
As SAP TM use the BOPF framework and as consultant you need to debug an Action, Determination, Validation, sometimes a request from a developer colleague is needed to review it as SAP TM in front end with Webdynpro you’re no familiar where setup a breakpoint or know which class/method should be use.
The Transaction - /SCMTMS/BONAV is useful to support in search analysis. This transaction gives all the standard TM implementations and the Custom one:

Using this transaction and select “Show Customer Enhancements” allow you select any custom implementation and show the details as bellow:

You can navigate direct to any Action give double click on it, to navigate to the Code or direct setting Breakpoint from outside in the transaction.

About the standard implementations in BOPF we can also view it selecting #SHOW_ALL
By using this one you can select any part which you need to set a breakpoint, i.e Which Select Profile is fetch once I start the Transportation Cockpit.

Setting breakpoint :

Start Transportation Cockpit

We can see the Breakpoint stop and view the name of the Selection profile:

This transaction can support Functional Consultant to check more details the code and implementations.
Refer to:
3195231 - Collection of SAP Notes to help root cause analysis - SAP for Me
Hope this help you!
Thank you and regards.
Rogerio Lima.