Buffer in Project Management – Definition and Meaning
A buffer in project management is a deliberately planned reserve of time—or occasionally of budget or resources—that is not assigned to a specific activity. It serves to absorb potential delays or unforeseen events during the course of a project without jeopardizing the overall project deadline or budget. Buffers are used to minimize risk by adding flexibility to the project schedule.
Example, best practice, and further information
In a construction project, for example, a buffer of five days might be scheduled after the shell construction phase to compensate for possible weather-related delays before the next phase begins. A best practice, particularly in Critical Chain Project Management, is to place buffers strategically at key points in the schedule (e.g. project buffer at the end, feeding buffers before the critical path), rather than distributing them across individual tasks. This aligns with time management techniques in the PMBOK Guide and buffering concepts, helping to ensure on-time project completion and reduce unnecessary stress caused by unrealistic task deadlines.