Introduced in 1997 in a book called Critical Chain by Eliyahu Goldratt
Based on his previous work called the Theory of Constraints
CCPM is based on the idea that people often inflate or add cushioning to their estimates to create a form of “safety” to compensate for uncertainty or risk because …
Your work is dependent upon the work of someone else, and you believe that starting your work will be delayed
Your pessimism from previous experience where things did not go as planned
Your belief that the project sponsor or customer will cut your project schedule or budget so you inflate your estimates to guard against this cut