Top management at Bachman Audio, a stereo equipment manufacturer, has been working with a consultant to implement ISO 9001. Together, they have been developing methods to meld manufacturing and other processes into efficient and effective systems. Thus, they have been addressing the principle of ISO 9001 known as the Question 43 options: a) mutually beneficial supplier relationships. b) system approach to management. c) factual approach to decision making. d) involvement of people. e) process approach