I’m currently working on an internal GitHub project where, for a change, my estimations have been wildly off. Before this project, I’d had a good multi-year streak of never overshooting my estimates and consistently hitting deadlines. This overshoot, combined with some recent reading, has made me think about hidden complexities of software estimation and what I didn’t consider when making my estimates. These are in a rough order from “most obvious” to “least obvious”.
