July 18, 2024
We challenge our problem solving classes to play “20 questions” – can we guess a randomly selected word using just 20 yes/no questions? Engineers often say it’s impossible. But, 99 out of 100 times, we find the word! How? There’s no magic: what’s on display is the power of binary decision making, what we call “splitting the dictionary”. And you can apply it to all sorts of real-world problem-solving scenarios. “Splitting the dictionary” is a problem scoping technique of asking the right questions to eliminate as many incorrect possibilities as you can, thus focusing your root cause search in the right area. Effective scoping is key to efficient problem-solving. Once the problem is clearly defined, think of the root cause as a needle in a haystack. Before you start examining hay, first ask “Am I on the right farm?”, then, “Which haystack should I search?”, then “Which portion of the chosen haystack is most likely to contain the needle?” Scoping out the possibilities with a simple tool or test can radically acc