20b6eeec_ion_Table___Passion_for_Coding__What_the_Programmer_Forgot
[Estimate] 2 days [The Programmer Thinks] It’s really quite a lot to code. I have to add some new tables to the database, a GUI for those and then the logic to read and write data to the tables. [Actual Time] 5 days [What the Programmer Forgot] 
2 days of work is too large to overview for most developers. There will surely be things that are missed. Not just small things, but entire major pieces of functionality required will be forgotten during the estimation.
Programmer Time Translation Table | Passion for Coding
What the Programmer Forgot