When have you had to criticize someones work before? Are you comfortable doing so?

"One time that I can recall would be when one of my team leads was not paying the close attention to her teams performance as I came to expect from her. I had to sit her down and started by asking her if there was a concern or a reason why she was less attentive to her job. She admitted to some personal issues she was having. I directed her to some resources from our HR department and then we made a plan for a follow up conversation a week from that date. Her performance improved greatly. I am absolutely comfortable in having difficult conversations and delivering feedback to my team."