Recruitment isn't easy, it's a long, arduous process that involves weighing up qualifications, personalities and the like.
In football, managers have scouts to help them with this process. They can also choose to go to games themselves, or turn on the TV.
Prospective new employees can be assessed relatively easily, their body of work over an extensive period of time can be recovered and absorbed.
But they still get it wrong. And, when you're committing £10m to bring this new employee over from a rival firm, that's an expensive mistake.
It may not work out because, in fact, the player is actually rubbish, or maybe he doesn't quite fit into your particular dressing room environment - the banter's too much for him!
They might struggle to settle into the new town, they may have uprooted from another country and not realised it's actually really cold on weeknights in Wigan.
Of course, all these things really should have been considered before completing the transfer, but oh well, you can always sign a replacement next year.
Here, we pick out five of the worst buys in 2013 - think of it as an end of year special.