You always run the risk of hiring someone bad. Interviewing, particularly rigorous interviewing, is a game that doesn't map very well onto work itself. That's

You always run the risk of hiring someone bad. Interviewing, particularly rigorous interviewing, is a game that doesn't map very well onto work itself. That's why the true test of a hiring process is the firing process. If you can get rid of people that can't hack it, rather than letting them gather as detritus in your system, you'll be far better off than if you simply pretend that you can actually avoid mistakes.