PEAS stands for Performance Measures, Environment, Actuators, and Sensors.

Performance Measure: If the objective function to judge the performance of the agent. For example, in case of pick and place robot, no of correct parts in a bin can be the performance measure.

Environment: It the real environment where the agent need to deliberate actions.

Actuators: These are the tools, equipment or organs using which agent performs actions in the environment. This works as output of the agent.

Sensors: These are tools, organs using which agent captures the state of the environment. This works as input to the agent.

PEAS descriptor for Automated Car Driver:

Performance Measure:

Safety: Automated system should be able to drive the car safely without dashing anywhere.

Optimum speed: Automated system should be able to maintain the optimal speed depending upon the surroundings.

Comfortable journey: Automated system should be able to give a comfortable journey to the end user.

Environment:

Roads: Automated car driver should be able to drive on any kind of a road ranging from city roads to highway.

Traffic conditions: You will find different sort of traffic conditions for different type of roads.

Actuators:

Steering wheel: used to direct car in desired directions.

Accelerator, gear: To increase or decrease speed of the car.

Sensors: To take i/p from environment in car driving example cameras, sonar system etc.