Since you didn't say what "this decision" happens to be, we cannot answer the question properly.
Depends on what kind of decision you have to make
information is needed to make an informed decision. What type of information depends on what type of decision.
In any business, all decisions are guided, or rather governed, by information. In order for management to make the "right" business decisions and ensure the success of their business, it would be necessary to have as much information as is available on the matter before making the decision. Shoudl they not have the information they need, this would more than likely lead to a poor business decision.
If you have some reasonable degree of understanding about how things happen in the real world and how the world functions, and if you have an adequate amount of information about the situation about which you wish to make a decision, you can then apply this knowledge in order to make a rational decision.
to make a decision means that you commit yourself to a course of action but before you made this very decision - and this happens most of the times - you had a choice of alternative actions each of this alternatives has a potential to take you somewhere (result in something), however you do not know that, or are not sure of that, or know nothing about that.. etc (for, if you knew, you would be sure that this one decision is the best one, and in that case that would not be a decision at all, but JUST DO IT!) but rarely you are, so you are happy if you can gain more information about the whole thing so that you can value the outcomes, but also the costs/efforts in order to get information you usually have to pay for it - in money, sweat or tears, so you also have to be sure that what you pay for information (in order to improve your decision) is really worth it you can say that (right and economic) information has a potential to improve your decision - to rise the chances that it was the right one
Make a plan.B.Define the problem.C.List solutions.D.Make a decision.
It means that you have not responded to a request for some information and the person who wanted the information has, or is about to, make a decision without the benefit of knowing what your response would have been.
Gather information consider values explore consequences make a decision
In economics, perfect knowledge describes the state in which a consumer has all possible information in order to make a decision. This situation is ideal, not usual.
A key to successful decision making is information gathering. With accurate and helpful information, one is in a better position to make correct decisions.
Most citizens would not have access to information to help them make an imformed decision.
That would properly be the presiding judge's decision to make.