Skill 6: Data Validation

Purpose

Automatically validate trip data quality using 4 validation algorithms. Runs after every trip creation and can be manually triggered.

Activation Triggers

• Automatic: After trip creation/reconstruction
• Manual: "validate", "check data", "run validation"
• Pre-report: Before report generation

4 Validation Algorithms

1. Distance Sum Validation (±10%)

What it checks: Odometer delta vs. sum of individual trip distances

Formula:

variance = |odometer_delta - trips_sum| / odometer_delta
ERROR if variance > 10%

Example:

Odometer delta: 820 km
Trips sum: 820 km
Variance: 0%
✅ Distance check passed

Why it matters: Ensures no trips are missing or duplicated between checkpoints.

2. Fuel Consumption Validation (±15%)

What it checks: Expected fuel vs. actual refuel amount

Formula:

expected_fuel = (trips_sum_km / 100) * vehicle_avg_efficiency
variance = |actual_fuel - expected_fuel| / expected_fuel
WARNING if variance > 15%

Example:

Expected fuel: 69.7L (820km ÷ 100 × 8.5 L/100km)
Actual fuel: 72.8L
Variance: +4.4%
✅ Fuel check passed (within ±15%)

Why it matters: Detects unusually high/low fuel consumption that may indicate errors.

3. Efficiency Range Validation

What it checks: Trip efficiency within fuel-type specific range

Ranges by fuel type:

• Diesel: 5-15 L/100km
• Gasoline: 6-20 L/100km
• LPG: 7-15 L/100km
• CNG: 4-10 kg/100km

Example:

Trip efficiency: 8.9 L/100km
Fuel type: Diesel
Range: 5-15 L/100km
✅ Efficiency in range

Why it matters: Catches data entry errors (e.g., 89 L/100km instead of 8.9).

4. Deviation from Average (±20%)

What it checks: Trip efficiency vs. vehicle's historical average

Formula:

deviation = |trip_efficiency - vehicle_avg| / vehicle_avg
WARNING if deviation > 20%

Example:

Trip efficiency: 8.9 L/100km
Vehicle average: 8.5 L/100km
Deviation: +4.7%
✅ Deviation acceptable (< 20%)

Why it matters: Flags unusual trips for review (heavy cargo, traffic, etc.).

Visual Presentation

All Checks Passed

Running validation...
✅ Distance: 820 km (0% variance)
✅ Fuel: 72.8L (+4.4%, within ±15%)
✅ Efficiency: 8.9 L/100km (Diesel: 5-15)
✅ Deviation: +4.7% from average

All checks passed! ✓

Warning Detected

Running validation...
✅ Distance: 820 km (0% variance)
⚠️  Fuel: 85.0L (+22.0%, exceeds ±15%)
✅ Efficiency: 10.4 L/100km (Diesel: 5-15)
⚠️  Deviation: +22.4% from average

Warnings detected. Review recommended.
💡 Possible causes:
   • Heavy cargo or trailer
   • Traffic or route changes
   • Aggressive driving

Error Detected

Running validation...
❌ Distance: 920 km (+12.2%, exceeds ±10%)
✅ Fuel: 72.8L (+4.4%)
✅ Efficiency: 7.9 L/100km (Diesel: 5-15)
✅ Deviation: -7.1% from average

ERROR: Distance variance too high!
💡 Possible causes:
   • Missing trip between checkpoints
   • Incorrect odometer reading
   • Trip distance miscalculated

Warning vs. Error Distinction

Errors (Block Save/Report)

• ❌ Distance variance > 10%: Critical data integrity issue
• ❌ Efficiency out of range: Likely data entry error
• ❌ Missing mandatory fields: Slovak compliance violation

Warnings (Allow User Override)

• ⚠️ Fuel variance > 15%: Unusual but possible
• ⚠️ Deviation > 20%: Flag for review
• ⚠️ Route deviation: Different path taken

Contextual Suggestions

Distance variance high: → "Check for missing trips or incorrect odometer reading"

Fuel consumption high: → "Was there heavy cargo, trailer, or traffic?"

Efficiency out of range: → "Verify distance and fuel entries are correct"

Deviation high but in range: → "Unusual but acceptable. Add note if known cause."

Automatic Validation Flow

1. After trip creation:

   • Run all 4 algorithms
   • Display results
   • Block save if errors
   • Allow override if warnings only

2. Before report generation:

   • Validate all trips in range
   • Show summary of issues
   • Prevent report if compliance errors

3. Manual validation:

   • Run on specific checkpoint pair
   • Run on specific trip
   • Run on entire vehicle history

Related Skills

• Skill 2: Checkpoint from Receipt (provides data)
• Skill 3: Trip Reconstruction (creates trips to validate)
• Skill 5: Report Generation (pre-validation required)

MCP Tools Used

• validation.validate_checkpoint_pair (distance sum)
• validation.validate_trip (fuel consumption)
• validation.check_efficiency (range check)
• validation.check_deviation_from_average (historical comparison)