Hi Terry,
At our site we have a lot of people making work orders for the equipment all differently making it a planners headache to fix.
if you are talking about order created redundantly/duplicate then better activate object info Pop up, which intern will give information to user that there are some open orders against this Equipment.
it is more of a training user or else you should think of having some custom/enhancement logic to Pop up and restrict user from creating duplicate Order.
Rgds
Sunil