Edge cases
Edge cases are the points at which a process stops working. It’s the customer that tries to enter via the exit. Or wants to pay on card when you are cash only. Or someone that adds 20kg to a container that only holds 10kg.
Edge cases are helpful, they help you find the bounds or ranges of your process. Addressing them can further these bounds. Or constrain them. They are tactical real feedback.
How you address that feedback – sets the tone for future edge cases.
And most often the lens is, do we want to increase the addressability of our process? Or is this the limit we want? Both can be right. And both communicate to your customers.