Chuck Amaro is an associate at a research firm. He just completed his Ph.D., and is now consulting on a project on the use of design reviews in industry. One of Chuck’s tasks is to determine how design reviews are really conducted in the real world and to what ends. Chuck has never done this kind of research before, but he feels confident that he knows what to do. He develops a "common sense approach, as opposed to a specific, rigorously defined social science approach"3 . Chuck interviews 50 software engineers on three different continents, each for 2 to 11 hours. The engineers were selected based on their proximity (to reduce travel costs), notoriety, and similarity to his target audience.