Strange, I knew a less humorous (and, I think, more useful and realistic) rule: 80% of the work is completed in 20% of the total development time; while the re

Strange, I knew a less humorous (and, I think, more useful and realistic) rule: 80% of the work is completed in 20% of the total development time; while the remaining 20% of work consumes 80% of the time. And this is something I've seen again and again: the large, most impactful features and architecture of a system are designed and implemented fairly quickly; it's the many small details get forever to be defined and implemented accurately.