Process Model Monitoring - process node response times calculation

Hi All,

I have a parent process A where I have wired another process B as a sub process.

When I look at an instance of process A, I can see that the start process node takes 11 second to execute (I am looking at the process node > response time in the process details tab).

When I look into the instance of process B, I can see that the response times for each and every node does not add up to 11 seconds (adds only up to 7 seconds). I would assume that in this case, the response time for individual nodes should be added up.

Does anyone know how does the calculation of the response time is done?

Thanks,

S