> What is so hard that people find estimating their work?
The central difficulty and huge part of many programming projects is actually the "unknown stuff" that is insanely hard to estimate, be it
- requirements set up by users are often very vague
- interacting with some very complicated third-party library/software that takes years to only understand the basics of
- many programming tasks are unique, thus you have never implemented anything remotely related, and thus also have hardly any idea where the difficulties might lie
- the new software "has to behave like the old one". In the old software, there exists an insane amount of corner behaviour where nobody has any idea why it was introduced, but the users will at some point complain if the new software behaves only a little bit different in such an obscure corner case
> The central difficulty and huge part of many programming projects is actually the "unknown stuff" that is insanely hard to estimate, be it
This is my observation as well.
I also think that devs tend to consider the central problem they're solving when estimating, rather than the totality of the work that has to be done in order to complete a task. If I'm tasked with adding a new feature, my mind is focused on the business logic of that feature and if you ask me how long it's going to take, I'll tend to answer the time for just that. I'll tend to forget the time required for all the other ancillary work around that (documentation, UI changes, code review, QA, etc.) Omitting that stuff results in wildly optimistic estimates.
The central difficulty and huge part of many programming projects is actually the "unknown stuff" that is insanely hard to estimate, be it
- requirements set up by users are often very vague
- interacting with some very complicated third-party library/software that takes years to only understand the basics of
- many programming tasks are unique, thus you have never implemented anything remotely related, and thus also have hardly any idea where the difficulties might lie
- the new software "has to behave like the old one". In the old software, there exists an insane amount of corner behaviour where nobody has any idea why it was introduced, but the users will at some point complain if the new software behaves only a little bit different in such an obscure corner case