Hi Nitin,
happy to see that the process status is now working in your sample. Eventually, the end flag was missing in your first process definition. To avoid these kinds of errors it may be useful to run the Process Definition Checks, i.e. report (or transaction) POC_MODEL_CHECK. This is always a good practice. With a later support package, we have also integrated it into the Process Definition Viewer, so you can start it right from there.
When I look at the count KPI definition, I see that you have defined to count only the SO changes that are done after an outbook delivery was created. In your log sample all changes are done before the delivery was created.
To count all SO changes, you can change the KPI definition in the following way: Clear the determiner and the determiner definition and try again.
Regards,
Bernd