"Robert," So glad you could close the loop!  I hope things weren't too direct for you.  And I'm sorry if I sounded like a Monday morning quarterback.  I've made the same mistakes, yours, your bosses and Juan's too.  Thanks for closing the loop.

In my mind, your lack of knowledge is not a personal weakness, it was simply a fact or a constraint.  To me, a "weakness" is a tendency.  In this case, you needed to know how to hold your teammate accountable for the downturn in their personal performance.  You certainly didn't anticipate the outcome you got, or you would have sought out other methods.  And, you seem to be getting better at it.  Many of us have had to learn the art of accountability the hard way.  (<a href="http://leadchangegroup.com/members/susanmazza" rel="nofollow">Susan Mazza </a>has a training program titled "Art of Accountability" and you can connect with her if you're interested.)

To me, the art of developing people is knowing which skills to employ to help people do their best and be their best.  For many of your teammates, the actions you took worked.  They went on to great success.

Best of luck.  Mike...