A waterfall diagram is a visual representation of data that is presented as a set of steps or stages. It is a useful tool for analyzing the flow of information or resources in a system, and can be used in a variety of applications, from software development to financial analysis. There are several synonyms for a waterfall diagram, depending on the context in which it is used. These include flowchart, process diagram, timeline, and sequential chart. Regardless of the terminology used, the purpose of these diagrams remains the same: to illustrate the sequential nature of a process or event, highlighting key stages and the relationship between them.