- The operator's personal safety, health and welfare.
- The safety and health of other people.
- The safety and condition of the equipment operated and maintained.
- Minimizing damage to the environment.
- Continued operation of the plant.
- Training a replacement.
- Preserving historical data.
- Economic operation of the plant.
Source - Boiler Operator's Handbook / Kenneth E. Heselton / The Fairmont Press.