which of the following best describes supply chain management?
a. a program certifying that a factory,laboratory,or office has met the quality management standards of the International Organization for Standardization.
b. the redesigning of business processes to improve performance,quality,and productivity.
c. a certification program attesting to the fact that a factory,laboratory,or office has improved environmental performance.
d. the principle of looking at the supply chain as a whole in order to improve the overall flow through the system.