An S-curve in project management is used to plot:
Choose the correct answer
Resource usage per time period (resource histogram)
Cumulative planned and actual cost or work progress versus time
Float variation of critical activities over the project
Number of activities completed vs number scheduled per period
Correct Answer
B. Cumulative planned and actual cost or work progress versus time
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S-curve: Y = cumulative cost/progress, X = time. Shape is S-shaped: slow start (mobilisation), rapid build-up (peak construction), slowdown (commissioning/closeout). Used to compare planned S-curve vs actual S-curve: gap below = behind schedule/under-spend; gap above = over-spend. Essential for project tracking and cash flow forecasting.
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