摘要：This paper analyzes the existing types of duration estimation models for software projects. We focus on Metrix model and investigate its applicability for duration estimation of software projects that focus on delivering workflow based software systems. The Metrix mod-el is a stochastic, knowledge-based Monte Carlo simulation over an activity graph. The model overcomes the limitations of other existing models by relying on a knowledge-base of pre-calculated discreet probability distributions for task duration. These probability distributions are automatically derived using the historical task duration estimation of the team members.
