@ Transposer: We've been using the test, unchanged, since 2007 and back then we accepted scores much lower than 100%. We also did very little other testing before hiring, as before the recession warm bodies were in short supply. After the crash, I was laying people off for two years, and then my first re-hires were crew that had already worked for me, who I knew well. I started hiring strangers again in 2010, and that's when I found, in two examples, that there was a big difference between a 99 and a 100. In the last two years, I've had a shop manager who was much more interested in training new workers than my previous manager, but we still found that the 99 guys didn't work, the 100 guys were better, although not a 100% bet. So I continue to look for that perfect score on the test as a prerequisite for continuing the hiring process. I don't like extended shop trial periods, as I don't want a new guy working on customer projects without an explicit understanding that they are hired and being trained. There are insurance issues with trial periods, too.
My latest hire was for a social media/marketing position and it was way different from hiring cabinetmakers. First of all, the applicant pool is much larger, so I had 64 applicants to choose from. Second of all, I was looking for phone and email skills, so much of the interviewing was done that way, and produced useful information. I found a very good person at a reasonable price, who so far is doing an excellent job.
I can't say that I've mastered hiring, but the test is an essential part of the process and has been helpful in evaluating all kinds of candidates.