This is a good approach. At the very least, it helps to have been clearly communicating expectations so they're aware that they're not meeting those expectatio

This is a good approach. At the very least, it helps to have been clearly communicating expectations so they're aware that they're not meeting those expectations. Honestly, few are going to disagree based on your description. The way you presented it makes it seem obvious. I think you're more likely trying to overcome personal qualms or guilt about having to take this action, which is perfectly normal and shows you're still human, when you already have your decision made. It sucks, but it may be necessary. You can present it as a choice: they have to want to work harder and longer or your organization may not have been what they were looking for---that it isn't their optimal fit.