When I was managing, I informally typed people during the interview process, which was very helpful in predicting both how they would interact with other team members and how they would do at particular tasks. However, I learned not to rely on self-reported personality types or tests, which are often answered aspirationally, not realistically. To me, MBTI or Big 5 (not the actual tests, but their framing of aspects o…
Not a huge sample size, but everyone has agreed on the output of their tests. Only in a few instances (like 1 of the strengths for a few people) were there surprises, (ex: Woo under Influencing) but they understood why it was a top strength and how it did make sense even though they wouldn't have chosen that for themselves if they were tasked with picking their top 5 strengths from the list instead of doing the test.
I don't like the personality tests at all. A strong team IMO should have a mix of personalities and strengths and I prefer to build teams based on just a few core values. From that approach, I've gotten a great mix of both personalities and strengths organically.
I could see maybe some teams using personality tests (ex: for sales) to architect a desired team type in a specific industry. Research is all over the place though on what's ideal. And can it be trusted as a hiring framework?
There are many other factors to consider. Let's say 5 specific personality traits perform the best in the aggregate in sales for one industry. But then people with those traits may be hard to retain. They may not get along with one another. They may create a toxic environment. There are too many things that are very hard to measure IMO to use that as your framework.
So I don't buy the personality test stuff in general. I suppose it may be a decent data point as your example of avoiding "assigning the wrong task to a person", but a strengths based approach makes more sense for that to me.