CM, good discussion. So many places to go with it!
CM
The information I gather will certainly influence my decision, no matter how black and white it is. The idea behind gathering information is to reduce or add to my uncertainty which will in turn affect my decision. The more informed I am regarding my surroundings, the better equipped I am to make a decision that does not succumb to the emotions of desire when we're talking powder runs. "We must make order out of the chaos" (W. Munter) is in part dealing with the "uncertainty" aspect of the equation. I accomplish this with a checklist approach in the planning phase. "The Checklist Manifesto" (Atul Gawande)
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So far as "formally" considering desire and uncertainty. I'm not familiar with any formal recording standards tied to either of those elements. What modern brain researchers will tell you, such as Johna Lehrer, author of "How We Decide" whose research in part is based on FMRI scans conducted on humans, is that emotions and logic are present yet play unequal roles in the decision making process; too much logic and you're lost in the inability to move forward, too much emotion and we all know what types of decisions that will lead to.
So that leaves us with considering that when traveling in the BC with friends in search of awesome turns, that we need to "think about how we think" - that emotion/desire and uncertainty go hand and hand in the decision making process and that we'd better consider how they conspire well prior to reaching any decision points in hazardous terrain.
In closing I would say that formally I consider uncertainty and desire by having options in hand prior to going out - a preferred and alternative option in hand and discussed with my touring partners prior to travel in hazardous environments. There is no question about how the desire of awesome powder or a long sought after objective will make me feel - how I react to it is the crux and that reaction needs to be injected with some degree of logic that revolves around the process of an informed decision.
ML