Every clarification breeds new questions.
The Ninety-Ninety Rule of Project Schedules - the first ninety percent of the task takes ninety percent of the time, and the last ten percent takes the other ninety percent.
A failure will not appear until a unit has passed final inspection.
Enough research will tend to support your conclusions.
An expert is the one who predicts the job will take the longest and cost the most.
Any given program will expand to fill all available memory.