Workflow to update Customer Market field

I have the following expression that I am trying to update a Market field based on the selected Industry field. 

IIf([<Industry>] = 'Aircraft Engines' OR [<Industry>] = 'Aircraft System' OR [<Industry>] = 'Airframes' OR [<Industry>] = 'Helicopter - Non Engine' , 'AVIATION', IIf([<Industry>] = 'Industrial Gas Turbines' OR [<Industry>] = 'Nuclear' OR [<Industry>] = 'Oil & Gas' OR [<Industry>] ='Power Generation - Non IGT', 'ENERGY', 'INDUSTRIAL' ))What I have found is that it appears that the industry field is not actually updated until I save the record so whatever was in the industry field the last time the record is saved is what is being used to evaluate the expression.  The industry field is the seeded industry field found in Data Rules & Assignment --> Industry Definition.