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guis and data

Users can enter anything in the fields

The system is doing exactly what it was designed to do: it lets people enter
the details for depots, descriptions, and addresses. The trouble is, even though
there are only a few depots, the Entry text fields lets the user type pretty
much anything. There are no controls on what gets entered into the GUI.

This is AMBIGUOUS. It
is not totally clear which
Cambridge is meant.

It wasn’t obvious whether the delivery was intended for the Head-Ex depot
in Cambridge, MA, or the Head-Ex depot in Cambridge, England. You need
some way to prevent users from entering ambiguous data in the depot field.

Think about the GUIs you’ve used in the past. How could you
restrict the values that someone could enter into a GUI?

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