I actually started one, then deleted because I was unsure. The question would be along the lines of:
We get lots of naive question on pumps and pumping systems. This site could use a concise guide to help these people get started.
what are the first steps in selecting and specifying a pump?
My answer would be "write down medium, flowrate and system curve or pressure diff. and find an appropriate centrifugal pump, if no centrifugal pump fits investigate other pump types" in a few more words.
However, when starting on an answer, I felt that a few things need consideration:
it's a huge subject: A concise getting started guide necessarily leaves out a lot. For an experienced engineer I will be obvious what was left out, for the target audience, not so much.
OTOH, some questions clearly would benefit from even such a bareboned guide
Ultimately, is such a Q&A something we (or rather some of us) want for this site, what should be the scope and most importantly who would put work into an answer?