Use when the user wants to audit a user journey, audit a signup/onboarding/checkout flow, do a UX audit, find the friction in a funnel, understand why users are dropping off or where they are being lost, or improve conversion in a web app — any diagnostic review of a multi-step, in-product flow. Use it whenever the user mentions drop-off, funnels, session replay, heatmaps, activation, time-to-value, cart or checkout abandonment, onboarding friction, or rage clicks, or wants to know where users struggle and what to fix first, even if they don't say "audit." Produces a severity-ranked, prioritized, experiment-validated improvement backlog via evidence-first intake, five parallel specialist lenses, and synthesis.