Work breakdown structure is a visual representation of the work's entire scope, broken down into tinier segments that each participant of the project team can understand, and this is because, with each of the completion levels, there are explanations and details relevant to that phase.
Work breakdown structure is defined as the hierarchical decomposition of the total amount of work that is to be accomplished. RBS, on the other hand, relies on specific tools that are necessary for accurate and efficient RBS, which can include resource calendars and activity lists.
It is a map or outline of a particular project, and the main task is the key deliverable in a WBS. RBS is becoming more relevant, with project management software incorporating it into its structure.