The Gantt chart, a bar graph that measures planned and completed work along each stage of production by time elapsed, is a tool developed and used in the approach of the classical perspective of management thinking. O a. scientific management O b. administrative principles O c. bureaucratic organizations 4. behavioral sciences Submit Next Previous Question 20 Question 2: Matrix organizations, self-managed teams, ideas about corporate culture, and management by wandering around are all concepts that grew out of management science O Maslow's hierarchy of needs. O the behavioral sciences approach the contingency view