There are many different ways of doing things. Few are wrong. Most make sense. In employment, there is a mantra of "Hire slow and fire fast." It means, take a long time to interview many people for a position and a longer time still to really get to know the potential candidate. Try to become as sure as you can possibly be that the fit is right before you offer the position. And then, if later on it proves that the employee has ceased to be a good fit, get rid of them pronto. Does getting a divorce require the same approach?