This paper was originally authored by Greg Gendall of Midori Media and published by Project Magazine in May 2003.
It has since been revised and updated by the present author.
It was submitted for publication by Email, February 16, 2009, and is copyright © David Garland.
Published here May 2009.

Introduction | What is an S-curve? | Resource Consumption | Progress Tracking
Using S-curves | Generating S-curves | Actual versus Target | Analysis | Conclusion

Analysis

S-curve Analysis

Initial examination of the S-curves generated above reveal the following about the status of the project.

  • The project has grown in scope. (The Target S-curve finishes above the Baseline S-curve)
  • The project has slipped. (The Target S-curve finishes to the right of the Baseline S-curve)
  • The project is behind schedule. (The Actual S-curve sits below the Target S-curve at the Cut Off Date)

Project Growth

Analysis of the Baseline and Target S-curve data reveals the project has grown in scope by 12 man-hours, or 14.29%.

  • i.e. Growth = Target MHs - Baseline MHs = 96 - 84 = 12
  • i.e. Growth % = (Target MHs / Baseline MHs - 1) x 100% = (96 / 84 - 1) x 100% = 14.29%

Project Slippage

Analysis of the Baseline and Target S-curve data reveals the project has slipped by 1 day, or 20.00%.

  • i.e. Slippage = Target Duration - Baseline Duration = 6 - 5 = 1
  • i.e. Slippage % = (Target Duration / Baseline Duration - 1) x 100% = (6 / 5 - 1) x 100% = 20.00%

Project Progress

According to MS Project, based on the Production Schedule the project is 50% complete. MS Project calculates percentage complete based on durations, and does not take into account man-hours assigned to each task. Analysis of the Actual and Target S-curve data reveals the project is 53.13% complete as of the Cut Off Date, while the project should be 59.38% complete.

  • i.e. Actual % Complete = (Actual YTD Man Hours @ Cut Off Date / Target Man Hours) x 100% = (51 / 96) x 100% = 53.13%
  • i.e. Target % Complete = (Target YTD Man Hours @ Cut Off Date / Target Man Hours) x 100% = (57 / 96) x 100% = 59.38%
Actual versus Target  Actual versus Target

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