Upgrade tool for existing production process instances on versioning
I implemented a process that sends e-mails to the customers while the orders are processed.
When I had to change the rule, I had a great problem in my hands, because BizAgi didn't give me a way to migrate existing process instances from one version to another, so my customers would receive "wrong" messages or would be in dead lock situations even after I fixed those problems in a new process version.
There could exist a tool for migrating existing processes instances to any other process version while defining default data values (when new data is created). See Lombardi's (IBM) job on that. They did this really well.