"Start Workflow" of Generic Object Service

[Kim, Go Joong]

Dear Experts,
 
There is 'Start Workflow' function in the Generic Object Service.
And the related workflows are determined automically by the system according to the online document.
 
But I don't know how these are determined.
 
Who knows how related workflows are determined?
What rules or criterion is used to determine?
 
Any opinion will be appreciated.
 
Regards,
Steve Kim