Practice / three models
Make the reasoning visible.
Use synthetic data and bounded models. These tools do not connect to vehicles, adapters, power supplies or robot controllers.
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Saved CAN-log review
Examine a real file format using a synthetic example. Count frames and identify observed byte changes.
Virtual electrical bench
Change the voltage and resistance in a one-resistor ideal model. Keep units and assumptions beside the result.
Supervised job-card simulation
Record scope and reviewed conditions. Inject a discrepancy and practice escalation to a responsible human.