There are two paths to a scenario: Guided (Numen interviews you) and Builder (you fill the form yourself). Both produce the exact same shape and feed the same compute engine. Choose by working style, not by feature.
Guided is best when
You are still finding the words for the future you are watching. Numen asks you to describe the future in your own language, extracts a working name and hypothesis, then proposes 5–8 signals from your library with reasoning per signal. You confirm, edit, or remove each. Total time: about 4 minutes.
Builder is best when
You already know exactly what you want. Title, hypothesis, horizon, signal map, leading actions — all visible at once, no conversational gating. The power-user path. Total time: about 90 seconds.
A note on horizon
Three months is rare for a real scenario. Twelve months is the most common. Twenty-four months is good for slow-moving structural shifts. Sixty months (five years) overlaps with Seer Backplan territory — if you are reaching for sixty months, consider whether Seer Backplan is the better surface.