It can serve to be useful to the work of Parliament. If that's your objective, then however you see that being useful, that can be a model that you can build.
Let's say you want to allow for witnesses. Well, you could establish a parallel chamber and there would be a mechanism that would make it clear that on such and such a day, witnesses will be invited to participate as.... In Britain, there are lay members of committee. Well, okay, let them be lay participants in the parallel chamber.