Most people start with a rough list. Cost matters. So do location, quality, speed, risk and the people involved. The hard part is rarely deciding whether something matters.
The hard part is deciding how much it matters compared with everything else.
Say the option you like best costs a fair bit more. How much is that preference worth to you? Or the cheapest option carries more risk. How much risk would you accept for the savings?
These aren't trick questions, and often there's no obvious answer. That is exactly why they're worth asking.
A Decidient assessment doesn't just collect a list of likes. It asks about how they relate, so the result reflects the way you'd actually trade one thing for another.
Sometimes that confirms what you already knew. Sometimes a factor you thought was essential matters less once you see what it costs you elsewhere, and something you barely considered ends up shaping the result.
When more than one person has a say, the same factors often carry different weights for each of them. Neither view is automatically right. Seeing the difference plainly gives you something specific to talk about.
Good decision support doesn't replace your judgment. It gives it some structure.