Lucas Costa has written a good article on how to build systems that can handle code-generating robots. Unfortunately, when calling it backpressure, he used the wrong metaphor. Backpressure is about signaling to upstream processes that they are running too fast and need to slow down. The suggestions presented by Costa are mostly about signaling to the upstream process that it needs to do things differently, rather than just slow down. This has more to do with ensuring sufficient quality is sent downstream, rather than quantity. This irked me. As I was reading, I was searching for the right analogy. I kept coming back to lean manufacturing. The more famous half of the lean philosophy is waste reduction. The other half is about managing the unstable input of people. That’s what we’re interested in here. (Continue reading the full article on the web.)
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