This is what I would later call the Rule of 95/5: Manage 95 percent of your business down to the penny; spend the last 5 percent “foolishly.” It sounds irresponsible; in fact, it’s anything but. Because that last 5 percent has an outsize impact on the guest experience, it’s some of the smartest money you’ll ever spend.
Will Guidara in Unreasonable Hospitality