Kix
Here is a start
https://www.awspubs.com/download/previews/ARE-12PV.pdfAlso the AWS has a Certified Welding Supervisor ticket, when applied this knowledge would be beneficial.
There is no easy straight answer to your question.
All of the four are dependent on personnel, facility, equipment, and atmosphere.
Quality, cost, productivity and Safety should be analyzed, discussed, and goals determined to hone the variables out.
But Good Luck
Marshall