Customize the Org Chart. Save the chart. A dialog window will open up where you can select from various SmartArt graphics like process, cycle, pyramid, matrix, etc. Here, you will see a Hierarchy ...

There are two main types of organisational structure used in businesses – hierarchical (or tall) and flat. A flat structure is an organisational structure with only a few layers of management.

Lee, Michael Y., and Amy C. Edmondson. "Self-Managing Organizations: Exploring the Limits of Less-Hierarchical Organizing." Research in Organizational Behavior 37 (2017): 35–58.