Bangkok evenings mean humid air, crowded BTS transfers, and packet loss that polite dashboards ignore. When Wavehub Current Institute pilots a new SLI bundle, we start by asking teams to chart three user journeys that already failed quietly last quarter—not hypotheticals.
The first paragraph of any SLI draft should name the measurement window and the population slice. We spend an entire studio night debating whether “active session” belongs in the numerator or as a denominator guardrail. The argument is intentionally slow; speed arrives later when mentors mark up the doc in red ink borrowed from architectural reprographics shops near Yaowaraj.
By week two, cohorts import anonymized traces (JSON exports only) and overlay handwritten ticks where they would have paged humans unnecessarily. The third week is quieter: learners record a six-minute voice memo explaining their burn-rate chart to a fictional executive who only listens while commuting. If the memo sounds empathetic, the SLI probably survives contact with reality.