---
title: "Discussion on \"The most useful number my system produces is one I never set out to build\" | Hashnode"
description: "Discussion on \"The most useful number my system produces is one I never set out to build\". Built to pick the next question, the per-subject estimate turned out to be the useful output. Notes on graders, parent reporting and what a number hides."
url: "https://hashnode.com/posts/the-most-useful-number-my-system-produces-is-one-i-never-set-out-to-build/6ad93e4c1877198bcb76b0b3"
---

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# [The most useful number my system produces is one I never set out to build](https://openred.hashnode.dev/the-most-useful-number-my-system-produces-is-one-i-never-set-out-to-build?utm_source=hashnode&utm_medium=feed)

Built to pick the next question, the per-subject estimate turned out to be the useful output. Notes on graders, parent reporting and what a number hides.

Oct 21 · 2 min read · openred.hashnode.dev  
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## Written by

[Michael Hairetis](https://hashnode.com/@michaelhairetis)

@michaelhairetis · Marietta, GA USA

  
[View profile](https://hashnode.com/@michaelhairetis)

sharing my software engineering thoughts and ideas

Full stack engineer. 25+ years of production software engineering across e-commerce, workflow automation and agentic ai

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