What are the holes that exist in most employee selection processes that cause needless hiring mistakes? (multiple answers permitted)

What is motivation-based interviewing?

Using behavior-based interviewing often results in extending a job offer to a marginal performer.

Most unmotivated employees were great hires but they changed after they were hired due to poor management, unrealistic job expectations and/or unsatisfactory working conditions.

Given enough time and hands-on interviewing experience, most interviewers will eventually learn how to correctly identify high achievers.

If an untrained interviewer uses an unstructured interview format (asks questions that pop into their head), the probability of hiring the best applicant is about 40% according to a Michigan State study.

According to a Harvard Business School study, 76% of turnover can be traced back to poor interviewing practices and bad hiring decisions.

Most companies track turnover and know exactly how many of their best performing employees are exiting and why.

Many managers who make hiring decisions are competent in their area of expertise but lack the proper interviewer training to know how to correctly identify applicants who will be 'High Performers' if hired.

When it comes to tracking hiring effectiveness, which one of these do most organizations NOT track?