# Class 2: JetBlue Capacity & Variability (✈️) *July 22, 2025 | [Transcript](./🦦/2🍔✈️15778_intro_ops_otter_ai.md)* ## 🎯 Teaching Arc **Hook**: "40% utilization yet massive delays - why?" **Puzzle**: ⭐️Flights ebb and flow → 1.7hr delays **Resolution**: ⭐️Variability causes delays (quantified from Burger King) **Model**: ⭐️36% demand increase → 100% delay increase (NONLINEAR) ## 🗣️ Quality Participation [Extract from transcript] ## 📊 Quick Scores Track: Variability-delay connection insights ## 🔗 421 Diagram ``` 🟢 Deicing capacity 🟣 Business travelers Flight schedule On-time needs \ / Coordinate ←→ Compel / \ 🟠 Minimize delays 🔴 Reliable schedule Control costs Premium pricing ``` ## 📚 Exam Essentials **Key Insights**: - ⭐️σ/√T: More aggregated → lower variability - ⭐️Clock asymmetry: Customers think minutes, suppliers hours - ⭐️Burst causes delays (no minute-by-minute planning) **Math**: 58→75 flights (+36%) → 1.7→3.6hr delay (+110%) **Traps**: ❌"Low utilization = waste" ✅"Buffer for variability" ## 🎓 Recitation Points - "Two flights delay → four in process" - "Peak demand bursts overwhelm system" - "Process redesign hard across 5k stores" --- *Previous: [Introduction](./1🌾_Intro_Bio.md) | Next: [JetBlue/Uber](./3✈️🚗_JetBlue_Uber.md)*