Over the past five months, two Boeing 737 Max airliners have crashed, killing 356 people. Although the story is still unfolding and the investigation is underway, preliminary evidence suggests that design flaws are the cause of the crashes. Here’s a recap…
“All models are wrong but some are useful.” – George Box As an engineer, I was trained to model the world: take a complex system—say, an oil-well drillstring extending several kilometers underground—make assumptions on what matters (e.g., contact with the…
Looking for perfection isn’t necessarily desirable because it’s expensive and the end product isn’t even necessarily optimal.
For those of us discovering the MECE concept (mutually exclusive and collectively exhaustive), it can be oh-so-attractive: finally, a way to organize my thoughts! It’s simple and elegant. The acronym is even catchy. Why didn’t I hear of this before? This is it! Douglas…
We’ve talked about how thinking in a mutually exclusive and collective exhaustive way is central to effective problem solving. But this is such an important concept that we should talk about it more. First, be CEME, not MECE To solve a problem…
Matthew Juniper, at Cambridge, demonstrates how to build issue trees. His approach is very similar to ours and he has an excellent video to describe it so you might want to watch it; here are the highlights I like best. Work on…
This entry is part of a multi-post case study. You’ve identified your problem. You’ve uncovered its root causes by building a why tree and by testing hypotheses. So you’ve covered the first two steps of the problem-solving process. Next, you need to identify solutions. This requires you to…
This entry is part of a multi-post case study. So, we’re back to our cables negotiation. We’ve defined the problem and identified the basic framework for breaking down the key question. Next we need to build our diagnostic tree, why…
This entry is part of a multi-post case study. So, you’ve defined your problem; well done! Now you need to look for its root cause(s). We’ll use a specific type of issue tree: a why issue tree (or diagnostic issue tree)….
In a complete problem-solving process you’ll have to build two logic trees: one “why” to find the root cause of your problem and one “how” to identify potential solutions. The good news is, you might not have to start them from…