In this sense, the first and foremost is to identify the objective that you are really after and which decision needs to be made to reach it, though they need not coincide (for example, even though your decision may be to buy an apartment, it need not be your objective as well. If your objective is to enjoy the perks of home with your family, another decision to evaluate, besides buying, may be renting).
This dilemma may arise in simple decisions as well. You may try to decide whether to go see a movie or not. In this case, your decision will coincide with your objective if you have been looking forward to the movie for some time because you’re fan of the saga. Or else, it will not coincide if your objective is to spend a fun evening with friends. In this case you can also choose to do something different, like a shopping trip, a game, drinks at a bar, etc.
If your decision coincides with your objective, you do not have to differentiate between the two words when answering the questionnaire. In cases where you have different decisions for the same objective, you may want to evaluate each decision separately, even though the objective coincides, and determine, by comparing each respective index, which decision works for you best.