Final answer:
Tech B is correct in saying that initial questioning of the customer is an essential first step in diagnostic procedures, unlike Tech A's approach of starting with the most complicated tests.
Step-by-step explanation:
The correct individual in this scenario is Tech B, who suggests that you should first question the customer to obtain as much information as possible about the problem. This is a common and recommended approach in the diagnostic procedure because it allows the technician to gather valuable background information that can inform and streamline further testing. Starting with the most complicated diagnostic tests first, as suggested by Tech A, is not an efficient or logical approach. A more methodical and straightforward diagnostic path, beginning with customer information and basic diagnostics, is likely to save time and resources while leading to a more accurate diagnosis. In the context of health and medicine, similar principles apply where doctors gather patient history and symptoms before moving to sophisticated tests or treatments.