David Lester (5/7/2010)
There are a dozen values, which break down to the three categories.
Using the above statement as reference I would agree that adding a new column to the target FACT table is the right thing to do. After initial population of the column, ETL process should take care of setting the right value during load.
A nice touch will be to create a DIM table describing the possible values of such new column.
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Pablo (Paul) Berzukov
Author of Understanding Database Administration available at Amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.