Why the question works
Most comparison questions invite a prepared answer. This one does not, because nobody rehearses a failure. What comes back tells you how the provider understands their own operation: whether they see problems as caused by clients, by staff, or by decisions they made themselves. That orientation is a good predictor of how a problem at your site would be handled and whether anybody would tell you about it early.
It also tests candour under mild pressure. A provider who deflects entirely, blaming an unreasonable client or an unavoidable circumstance, is showing you the response you would receive from them. A provider who names something they got wrong and describes what changed has demonstrated a habit that matters far more than any assurance in a proposal and it is available to you for the cost of one awkward question.
