Estimating isn't always an easy job. Sometimes snap decisions can produce negative long-term effects.
This book was designed by the American Society of Professional Estimators as a set of standards to guide professional estimators. It's intended to help every estimator develop estimates that are uniform and verifiable. Every step that should be included in the estimate is listed, as well as aspects in the plans to consider when estimating a job and what you should look for that may not be included. The result should help you produce more consistently accurate estimates.