The most common type of interaction diagram is a sequence diagram example . Interaction diagram – An interaction diagram depicts a system's interactive behavior. Because visualizing interactions in a system can be difficult, we employ various interaction diagrams to capture different features and aspects of interaction in a system. A sequence diagram example depicts the interaction of objects in sequential order, i.e., the order in which these interactions occur. A sequence diagram can also be referred to using event diagrams or event scenarios. Sequence diagrams show how and in what order the objects in the system work. Businesspeople and software developers frequently use these diagrams to document and understand requirements for new and existing products.