Parkinson’s Law
Parkinson’s Law is usually expressed as “Work expands so as to fill the time available for its completion.” If something must be done in a year, it’ll be done in a year. If it must be done in six months, then it will.
Parkinson’s Law should not be used to set unreasonable deadlines.
Parkinson’s Law is best used as a Thought Experiment question. What would it look like to finish a project on a very short period of time?