When you complete this lesson, you will be able to explain the relationship between energy, work and efficiency. Heat rate, the term used to express power plant efficiency will be part of your vocabulary. You will be able to explain how the boiler, turbine cycle, and generator comprise plant heat rate. You will be able to explain how heat rate is affected by key plant parameters known as performance parameters. Finally, you will be able to explain the roles of operations, maintenance, engineering, and plant management in the plant heat rate program.