If you design something so that it has a 99% chance of lasting 90 days, there's a pretty good chance it'll last 6 months or even a year. Especially since failur

If you design something so that it has a 99% chance of lasting 90 days, there's a pretty good chance it'll last 6 months or even a year. Especially since failures tend to follow a bathtub curve: https://en.wikipedia.org/wiki/Bathtub_curve https://en.wikipedia.org/wiki/Bathtub_curve