When choosing someone for a task, make sure you clarify the reason why they’ve been chosen.
You were the first one entering the door this morning.
Everyone else is very busy at the moment.
We’ve already purchased a license for you.
I allocated the tasks so that everyone has a fair chance to show their value.
Sure, these are reasons, and they are used more often than one thinks. But if we leave these decisions to chance or rationality, chances are the person chosen will not really feel motivated to do the task. After all, if anyone can do it, why give that little bit more, why deliver your best game, why bother in the first place.
We consider this a critical task for the company, because of X and Y. You have shown you can deliver fantastic job in this area, for example when Z. You have also told me that you are passionate about A and would like to contribute. This is why I could not think of anyone better in the team to take on this challenge and really turn things around. What do you think?
On the other hand, if the decision is based on a real knowledge of the other person, of their job, of their strengths, of their passions, of what they care about. Well, you can expect the outcome to be a whole lot different, can’t you?