, 4 tweets, 1 min read Read on Twitter
For most people, the main benefit of formal methods isn't "saving lives". It's "not getting woken up at 3 AM because production's got a weird bug". A few hours of planning can save a week of debugging.
By having a specification, you can 'test' the global, high-level behavior of your system. Does it still work if you receive messages out of order? If someone three people make changes at the same time? If the union of two conceptually-linked relationship graphs has a cycle?
One of my favorite memories was getting a complaint from a vendor, saying our integration was broken, and showing them a formal spec of our end-to-end algorithm. "If we implemented this right, the bug will be in how your code handles our valid POST request in step 3."

It was.
If this stuff interests you, I wrote a post on using FM here (hillelwayne.com/post/using-for…). Or just DM me! I like talking about this stuff :D

I also consult in it! You can check my creds here: hillelwayne.com/consulting/
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