This is an interesting article by David Gerstel, who wrote the book “Nail Your Numbers: A Path to Skilled Construction Estimating and Bidding.”

https://www.jlconline.com/business/estimating-job-costing/your-bidding-and-estimating-tune-up-guide_o

You can join the site for free and download many articles, otherwise you can download just this article for free (but you have to click on the download button pretty fast or you’ll get a “please register” pop-up that stops you from reading – just reload the page and be quick lol).

The article poses a number of questions that a builder should ask themselves but the information would be beneficial to a homeowner or DIYer as well.