When assembling evidence Bardach recommends the following
1.Think before you collect, don't do a literature review, don't use "best practice," use analogies, and start early.
2.Think before you collect, do a literature review, survey "best practice," use analogies, and start early.
3.Think before you collect, do a literature review, survey "best practice," use analogies, and procrastinate collecting evidence.
4.Think before you collect, do a literature review, survey "best practice," don't use analogies, and wait to collect data."