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Add and expand upon estimates docs from GitLab, original written by Clayton

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benjamin melançon 2025-07-11 14:02:22 -04:00
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We write [user stories](approach/user-stories.md) with the client and then estimate complexity on our own, ideally two different developers independently come up with an estimate and then compare and discuss the reason for differences to get to a final number.
We estimate complexity using the Fibonacci sequence because complexity grows exponentially. More info at http://www.yakyma.com/2012/05/why-progressive-estimation-scale-is-so.html
We usually translate that complexity point into twice as many hours. For example, an issue with a complexity of 5 translates to 10 hours. This is based very roughly on our typical velocity.
## Estimating migrations
Historically, We estimate the complexity for migrating Drupal entities roughly based on the following formula:
1 * # Entities + 2 * # Fields = Migration Complexity