A method and system for estimating complex projects including one or more tasks. The estimating system includes a user interface, an analyzer, and an estimator. The system determines characteristics for a basic task, and receives an assigned cost for the basic task. Then task information for the complex project is analyzed based on the characteristics of the basic task. The system then determines costs for one or more additional tasks, complexity, input timing, and input quality, and estimates the total project cost based on these costs.