The PERT distribution is widely used in risk analysis to represent the uncertainty of the value of some quantity where one is relying on subjective estimates, because the three parameters defining the distribution are intuitive to the estimator.
The PERT distribution is widely used in risk analysis Project Management Body of Knowledge: 5th Ed (2013). Project Management Institute Chapter 6 to represent the uncertainty of the value of some quantity where one is relying on subjective estimates, because the three parameters defining the distribution are intuitive to the estimator.