What is the function of the operator's joystick controls?

The operator's joystick controls are crucial for the precise maneuvering of the boom, stick, and bucket of the hydraulic excavator. These joysticks allow the operator to perform intricate movements with the excavator's arm attachments, facilitating tasks such as digging, lifting, and placing materials with accuracy. The design of the joystick controls is such that each movement corresponding to the joystick translates directly to the corresponding motion of the excavator's components, providing the operator with enhanced control and responsiveness during operation. This functionality is essential for achieving effective and efficient performance in various excavation tasks, making it the vital aspect of operating the equipment. Other options do not accurately represent the primary role of joystick controls in hydraulic excavators.