>> Most of the data about costs is quite limited too. A lot of the numbers that people quote come from the 60s, specifically a project to develop software for a ground–to–air missile.
>Well that makes sense with my belief that WF aims to "deliver the system as a whole or not at all". There's no point in delivering an MVP G2A missile system that is not complete.
True! :)
Plus, the customer knew pretty much what they wanted from the start. Not much chance they watch the demo and then ask if it can be mounted to an airplane…
> To be sure, CI/CD pipelines make the fixing of bugs in the code cheap enough to simply deploy when you can. However, bugs in the specification aren't going to be cheaply fixed after deployment, and these are much more common[1] and hard to get correct than any other type of bug.
Yes, though in the agile model the idea is that the spec is just what the customer asked for two weeks ago (or whatever your sprint length is), after seeing how the program worked at that time. If there’s a misunderstanding and you correctly implemented the wrong thing, then the cost is at most the two weeks you spent on it.
>Well that makes sense with my belief that WF aims to "deliver the system as a whole or not at all". There's no point in delivering an MVP G2A missile system that is not complete.
True! :)
Plus, the customer knew pretty much what they wanted from the start. Not much chance they watch the demo and then ask if it can be mounted to an airplane…
> To be sure, CI/CD pipelines make the fixing of bugs in the code cheap enough to simply deploy when you can. However, bugs in the specification aren't going to be cheaply fixed after deployment, and these are much more common[1] and hard to get correct than any other type of bug.
Yes, though in the agile model the idea is that the spec is just what the customer asked for two weeks ago (or whatever your sprint length is), after seeing how the program worked at that time. If there’s a misunderstanding and you correctly implemented the wrong thing, then the cost is at most the two weeks you spent on it.