definition of an s-curve

An S-curve is a graph of the expenditure of project resources over time. Typical S-curves graph either costs or resource hours over time.

The S-curve graphs the cummulative value of expenditures on the y-axis, giving the graph it’s S shape. S-curves will often graph planned values, with the actual curve overlayed for comparison.

The real benefit of the S-curve is that it shows the total value at any point in time. The shape of the S-curve can reveal important information about the trend in spending or in resource utilization.

s-curve planned versus actual

Michael is an avid project controls blogger and is the Chief Learning Officer here at Plan Academy. Michael has taught 1000s professionals how to use project controls software like Primavera P6 over the past 10 years through his online courses and tutorials. Michael is a member of AACE, the Guild of Project Controls and holds his PMP certification from PMI.