Why Does Software Work Take So Long
Watts S. Humphrey · 1998
Have you ever started what you thought was a twoor three-day job and have it stretch into a week or two? Before deciding you are just bad at estimating, look at how you spent your time. You will find you spend much less time on projects than you imagine. For example, on one project, several engineers used time logs to track their time in minutes. They averaged only 16 to 18 hours a week on project tasks. They were surprised because they all worked a standard 40-hour week.