Glossary
Formalize who does what in the project: identification, responsibilities and organization chart

OBS

Organizational structure of the project, identifying the responsibilities of each contributor for each project task.

RACI

Matrix identifying the tasks to be carried out and the roles of the various players.

WBS

Hierarchical breakdown – based on tasks and activities – of the work that the project team must carry out to achieve the project objectives and produce the deliverables. These elements form the basis of the project schedule.