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6. Workshop quality control: hidden mistakes
Dialogue A: Customer: “The car is slow uphill.” Mechanic: “That is normal for an old car. I will change the air filter.”
Check: the mechanic dismisses the symptom and chooses a repair without tests.
Dialogue B: Customer: “I hear a click.” Mechanic: “Your battery is dead.” Customer: “The lights are bright.” Mechanic: “Batteries can be strange.”
Check: the mechanic ignores contradictory evidence and should test before confirming.
Dialogue C: Customer: “The warning light appeared yesterday.” Mechanic: “No problem, drive it here.”
Check: the mechanic has not identified the warning light or checked whether driving is safe.
7. Repair the mechanic's response
| Weak line | Professional repair |
|---|---|
| That is normal. | Let's check when it happens and compare the symptoms. |
| It is definitely the battery. | It may be the battery, but I need to test it first. |
| Drive it here. | First, tell me which warning light is on so we can decide whether it is safe. |
| I will replace the part. | I will inspect the system and explain the test results before replacing anything. |
8. Four customer messages
| Team | Message |
|---|---|
| 1 🔋 | The car clicks once. Lights are weak. It started with cables yesterday. |
| 2 ⚠️ | The engine runs, but a red warning light stays on. |
| 3 🔊 | A grinding noise appears only when braking. |
| 4 🌡️ | The temperature rises in traffic and there is a sweet smell. |
Team product: write three questions, one safety decision and one possible cause marked not confirmed.