If your data volume is less then you might want to go for a Write optimised DSO, and that too with a full load if your data runs into fewmillions. So that you can delete the request daily and reload again.
The reason you are getting EBAN to BI is that you might want to have a lookup in other DSO's from this EBAN DSO.. Its good to go for a DSO rather than a cube as it would be difficult to read for you from a cube in other DSO's or ODS.
A write optimised DSO would be the same of a cube in terms of space..no change log..
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