The Work Breakdown Structure (WBS) is one of the core principles that differentiates the PMI methodology from other PM methodologies
The Work Package is the lowest level of the WBS that can be delegated to an individual, team, department, or vendor
The WBS can be developed using phases, major deliverables, or subprojects
The WBS does not have any scheduling, resource, cost, or any other info except deliverable and project work related components
The WBS is a great communication tool to get the key stakeholders on the same page since it’s a visual representation of all the project work and nothing but the project work
The WBS Dictionary can be created to support the WBS and it has the rest of the info including description of work, responsible organization, schedule milestones, resources, cost estimates, quality requirements, acceptance criteria, contact info, etc.