I'm trying to help a friend solve this.
He created 5 different projects using paper and pencil method with the same attributes and levels, the only difference was the label of the price attributes, now he wants the 5 projects in only one.
About accumulating the databases I know that there is no problem, I can do this? Merge them into just one?
My fear is that versions have been created for each one.
So I imagine that in version 1 of concept 1 different options were presented and the database could come up with the same answer, but the interviewer saw different options.