Add two weeks to the schedule for expected unexpected delays. Add two more weeks for unexpected unexpected delays.
In any collection of data, the data that is most obviously correct-- beyond all need of checking -- is the mistake.
No matter what happens, there is always someone eager to misinterpret it.
Ask five experts, and you'll get five different explanations (six, if one went to Harvard).
Forecasting is very difficult, especially if it's about the future.
When it is not necessary to change, it is necessary not to change.
In software development, only two of the three parameters can be defined simultaneously: task, time, and resources.
It's easy to tell when you have a bargain -- it doesn't work.
Incompetents often hire able assistants.
Don't ask the barber whether you need a haircut.