Definition:
An S-Curve is a graphical representation of cumulative project progress, costs, or resource allocation over time. The curve typically follows an S-shaped trajectory, reflecting the natural evolution of a project:
- Slow Start (Initiation Phase) – The early stage where planning, approvals, and setup occur, leading to slow progress.
- Rapid Growth (Execution Phase) – Once the project is in full execution, progress accelerates rapidly, leading to a steep upward curve.
- Plateau (Completion Phase) – As the project nears completion, work slows down due to testing, quality control, and final refinements.
The S-Curve is an important tool for project tracking and forecasting, helping managers assess whether the project is progressing as planned.
For example, in a construction project, the S-Curve may show slow progress during site preparation, a steep rise during building construction, and a leveling off during finishing work and inspections.S-Curves are widely used in earned value management (EVM) to compare actual progress against planned progress, allowing teams to make informed decisions about project adjustments.
