Yes, your working structure should evolve when new evidence materially changes the case. The initial framework is a hypothesis map, not a contract.

You do not need to redraw everything after every exhibit. Update the structure when the new information changes priorities, eliminates a branch, or creates a new question that matters to the objective.

For example, if an exhibit shows demand is strong but margins are collapsing, you can explicitly deprioritize market attractiveness and move into cost or pricing drivers.

Signal the change in one sentence, then proceed. That demonstrates synthesis and adaptability rather than blindly following the first structure you wrote down. Think of the structure as a live map of the case: it should become simpler and more focused as evidence rules questions in or out. For more detail, see the case interview guide.