Process Tree is a modeling tool that develops pyramid-like ranking of processes and their content and embeds this data into a hierarchical structure in which every element (except for the top element and the bottom element) has one higher and one lower neighbor. This tool determines a way of ordering and prioritizing processes by various levels that all together create a process hierarchy with appropriate relationships between the components.
The general idea behind a typical tree of processes is to develop a visual hierarchical representation of relationships existing between the processes to explain how these processes interacts with each other within the hierarchy and what effects they produce to an object located outside the hierarchy.
Process tree is used in various fields. For example, in business process management it is used to rank business processes by significance, so that a business process that is at higher level of the business process tree gains greater authority, importance and influence. In decision making, the tool helps create a structured and hierarchical sequence of events or processes that lead to a particular decision. In problem analysis, process tree can be used to identify what factors cause a problem and what effects or consequences this problem generates.