I'd like to know about specific problems you - the SO reader - have solved using Workflow Engines and what libraries/frameworks you used if you didn't roll your own. I'd also like to know when a Workflow Engine wasn't the best choice and if/how you chose something simpler, like a TaskList/WorkList/Task-Management type application using state machines.

Questions:

  • What problems have you used workflow engines to solve?
  • What libraries/frameworks did you use?
  • When did a simpler State Machine/Task Management like system suffice?
  • Bonus: How did/do you make the distinction between Task Management and Workflow Engine?

I'm looking for first-hand experiences.

Some of the resources I've checked out:

state-machine business-process-management task-management workflow-engine
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