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Ferry Pilots - AnswerThis puzzle has many solutions, but only one best solution. Before discussing the CRM significance of multiple solutions to a problem let us see what the best solution is. Compare this optimum solution to the one you came up with. The most common solution is to use the supersonic jet as the "shuttle bird." In this scenario you fly each of the other airplanes to Toronto chasing with the supersonic jet. The jet is then used to return to Vancouver. Done this way the total time for the job is:
So, is it true that the best you can do is 41 hours? No, we can do better. Start by flying the two jets to Toronto, then return to Vancouver with either jet. The secret is in what you do next. Think about it a moment before clicking on final step. What Principle of CRM is at stake?This puzzle emphasizes one of the most important of CRM principles. Don't become over committed to the current circumstance!! Most people who don't solve this problem optimally fail because they don't realize that sometimes the most efficient thing to do is to undo something you have already done. Psychologically that is hard to do. Imagine how much harder it is in flight when your destination is in front of you, but you really need to turn back into good weather, or to get more fuel in the face of an unexpected headwind, or to a night lighted airport in the face of news that the destination airport lighting has just failed, etc. All too many accidents happen when the pilot cannot bring himself to turn back - in effect to undo what has already been done. Final StepLeave whichever jet you brought to Vancouver there and fly the two slow airplanes to Toronto. Then use the other jet to return to Vancouver. Here is the resulting table of times:
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