Decide whether to repair or replace an aging truck
Compares the total cost of keeping, rebuilding, or replacing a fleet vehicle, including downtime, resale, and financing.
The prompt
Help me decide whether to repair or replace a truck.
Unit: [TYPE, MAKE, MODEL YEAR, MILEAGE OR ENGINE HOURS]
The repair needed now: [e.g. "engine overhaul", "transmission", "aftertreatment system" - QUOTED COST AND DOWNTIME]
Maintenance history: [COST PER MILE LAST 12 AND 24 MONTHS, MAJOR REPAIRS, ROADSIDE BREAKDOWNS]
Fuel economy: [MPG OR L/100KM vs newer units]
Revenue lost when it's down: [PER DAY - or how we cover the load]
Resale or trade-in value: [AS-IS AND AFTER REPAIR]
Replacement options: [new / used, PRICE, FINANCING TERMS, LEAD TIME]
Planned use: [how many more years and miles we need from it]
Other factors: [emissions rules or low-emission zones, driver preference, warranty, tax treatment]
Compare three options over the same period: repair and keep, repair and sell soon, replace now.
For each, calculate:
- Total cost: repair, expected future maintenance, fuel, financing, downtime cost, minus resale value.
- Cost per mile.
- Reliability risk: chance of another major failure.
Return:
- A comparison table.
- A recommendation with the reasoning.
- The break-even point: the repair cost or mileage at which replacing wins.
- What would change the answer.
- A simple rule I can apply to future units (e.g. replace when cost per mile exceeds a set level for two quarters).
Use only my figures, mark estimates [ESTIMATE], and ask for anything missing as [ADD]. For tax and depreciation effects, check with my accountant.
Highlighted [brackets] are blanks to replace with your own details.
Fill in the blanks and use this promptMore Thinking & Decisions prompts
What to fill in
- TYPE, MAKE, MODEL YEAR, MILEAGE OR ENGINE HOURS
- MPG OR L/100KM vs newer units
- PER DAY - or how we cover the load
- AS-IS AND AFTER REPAIR
- new / used, PRICE, FINANCING TERMS, LEAD TIME
- how many more years and miles we need from it
- ESTIMATE
- ADD
How this prompt is built
This prompt follows the Few-Shot structure (Few-shot prompting). A few-shot prompt includes one or more worked examples of the input and the output you want, so the model can copy the pattern instead of guessing it.
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