After an error is detected and corrected, it will be found to have been correct in the first place.
If you look forward to three worthwhile events, they will all be scheduled at the same time.
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.