Create a risk-adjusted investment decision for replacing/retro-fitting [Fleet_Size] vehicles/vessels, comparing diesel, LNG, hybrid, and battery-electric alternatives. Model 10-year TCO/NPV in [Currency] with stochastic [Fuel_Price_Basis] curves, maintenance profiles, charging/bunkering availability, and carbon cost at [Carbon_Price]. Include residual value risk, technology obsolescence, and infrastructure lead times. Test compliance impacts and route suitability under real-world duty cycles. Recommend the option set that meets [Target_ROIC] within a [Capex_Budget] envelope.
Output format: 1) Summary. 2) Table: Option | Capex ([Currency]) | Opex/yr | CO₂e intensity | NPV (base/P90/P10) | Payback | Operational Risks | Mitigations. 3) Abatement cost per tonne curve with commentary. 4) Phased adoption roadmap with decision gates and performance thresholds.