With ProWorkflow, we wanted to ensure you could include ad hoc tasks as easily as possible. Even if you add unexpected steps to your workflow, you'll be acutely aware of what it is, why it's happening, who is doing it, and most importantly, how much time has been tracked against it. You'll also be able to see how it affected your schedule and push other tasks forward if necessary.
Now you'll be able to plan around random tasks, and you won't miss out on billed hours!