80/20 It's the edge cases that separate a good engineer from an average engineer. When that good engineer runs into that problem, he/she will solve it quickly

80/20 It's the edge cases that separate a good engineer from an average engineer. When that good engineer runs into that problem, he/she will solve it quickly and move on. An average engineer will spend days or weeks struggling with the solution -- costing lots of money and potentially delaying schedules.