Northstar Operations Risk Lab — Student Brief ============================================= Northstar needs an evidence-based service promise, quality escalation rule, warranty threshold, and project reserve. Submit: an original executive memo; reproducible R script; accessible tables and plots; model/assumption register; exact-versus-approximate audit; and one sensitivity analysis. Guided pathway follows the five model gates. Independent pathway may use alternative defensible models. Do not include real personal or proprietary data. Original synthetic data generated for STATLAB Academy. No textbook data used. Educational material for STATLAB Academy. Verify assumptions, units, tail direction, and rounding before making a decision.