Final answer:
The BEST method for measuring range of motion in a client recovering from a shoulder injury in a factory warehouse setting is for the Occupational Therapist to observe posture and compensatory motions while using a goniometer to measure the joint range of motion.
Step-by-step explanation:
The BEST method for measuring range of motion in a client recovering from a shoulder injury in a factory warehouse setting would be for the Occupational Therapist (OTR) to observe the client's posture and compensatory motions during the measurement. This will help identify any limitations or issues that may affect the client's ability to perform their job duties safely. The OTR should also use a goniometer to measure the joint range of motion, holding it in place while moving the client's shoulder through the range of motion.