"He just can't do what I need - we're going to have to find someone else..."
"She doesn't seem to understand how it works round here - do you think we can put her in another Department?"
"She seems to have lost that spark... I wonder what's happened to her?"

The chances are that these sorts of conversations are happening in your organisation, laced with a tinge of astonishment that things could have gone so badly wrong with an initially excellent hire - the early promise evaporating into thin air.  However, remarkably, few of us take a look at our own contribution to the apparent performance failing and we attribute the blame to anything other than ourselves: their attitude, their capability, the selection process, the training they received, their personal circumstances.....