Flowcharts

Hierarchy

A hierarchical chart is described as a visual representation of a system of hierarchy and can also be referred to as a structure chart. Roles, ranks or positions are clearly laid out in an illustrated format that depicts the relationship between the elements. The top of the chart is generally reserved for the most important or significant part of the system of hierarchy. Cascading down from the top are other components of the system hierarchy.

Linear 

Linear search is a sequential search is a method for finding a particular value in a list, that consists of checking everyone of its elements, one at a time and in sequence, until the desired one is found. A diagram representation  that uses graphic symbols to depict the nature and flow of the steps in a process. Each process is represented by different symbols, linear symbols are normally linked together with arrows showing the flow direction.