AI pilots rarely fail because the model is bad. They stall because nobody agreed, before kickoff, who is allowed to end the experiment. The published failure rates make the cost of that ambiguity concrete: 88% of AI pilots never reach production, and MIT's research found that 95% of enterprise pilots deliver no measurable profit-and-loss impact (Institute of AI PM). Analysts reach similar conclusions from the other side of the table: most pilots stall because they were built as demos rather than as the first version of a product, and stage gates with clear exit criteria prevent most stalls (Rubicon).
A stop rule is the mirror image of an exit criterion. The exit criteria say what must be true to advance. The stop rule says what happens when it is not, who decides, and how fast. Rubicon's stage-gate model describes each gate as a decision meeting with the business owner, IT, security and the delivery team, where the options are go, change or stop, and notes that stopping at a gate means the process worked (Rubicon). That is the correct framing: a stop is a normal output of governance, not an admission of failure.
Where it goes wrong is the gap between that sentence and a document a new hire could execute. A kill switch without decision rights is not a control, it is a rumor (Tyson Martin). This article closes the gap with a RACI chart.



