Simplicity--the art of maximizing the amount of work not done--is essential. - Agile Manifesto
Research indicates that the average software project is 45% over budget, delayed by 63% and missing 1/3 of the promised functionality.
Agile development practices can reduce those risks.
DRUPALCON ESTIMATING REQUIREMENTS
As part of my session A Method for Getting Early Estimates Right at DrupalCon CPH, I’ve made the example requirements and the resulting estimation sheet available.