The Decision Variable
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A decision variable has no probabilities attached — the agent chooses its value; chance variables get beliefs, decision variables get chosen.
Show
The umbrella case: one decision variable — carry or leave — one chance variable — rain at 0.3 — and four outcomes needing utilities.
Watch for
Drawing up that inventory — what I control, what chance controls, what I care — is most of the work.