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My vaccine queue

One of the recurrent problems of managing queues is randomness. And when human beings are involved, there is nearly always some randomness. And that's why queues involving machines are easier to deal with; machines are more predictable! Until the problem is scheduling emergency maintenance, due to a particular kind of randomness called failure. Many analyses of control of human queues advise that to be efficient, the randomness must be reduced. So, my day of second vaccination was an especially interesting experience for being in a queue which was very controlled for efficiency. I was there for my vaccination against Covid-19. The appointment was at 9:40am, along with about a dozen other people. But of course, we arrived at random times. We joined a single line to be checked in, one by one. Once past that point, control to deal with randomness started. Each patient was sent to a numbered chair, so there were ten of us, all ready to be called for a numbered "server''

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