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It’s about a train, but I think there are some good parallels to software. (Explored in comment.)

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    1. Distraction is bad. I think we all know this, but still fail to identify distraction in practice. No, no, this notification is truly important.

    2. Fail safe is good. Really.

    3. The scoop and run practice is really interesting. Best practice in some situations may not be best practice when the situation changes. When developing or following a process, identify whether when it’s relevant.

    4. A few months ago, there was a lot of assumption that cell phone use was to blame. Human error is the cause of many faults, but it’s not always the human error we think it is.

    5. Nobody wants to retrofit and upgrade systems until they absolutely have to. Preventive maintenance doesn’t prevent much unless you do it before the failure.