When Things Go Wrong: Green’s Curve Theory
Undetected ambiguities, omissions, and other errors in project objectives result in errors that don’t become obvious until later in the project. These errors then require changes in the project baseline, and the result is a phenomenon known as Green’s Curve Theory.

• Projects tend to be under staffed early in their lifecycle,
  
  
• Schedules tend to slip,
  
  
• Costs increase in total and on the back end,
  
  
• Reserve should be biased to the right.