Sponsored Content

Suppose that on your way to a summer holiday resort (a very distant place), your car breaks down. You might just call roadside assistance and wait for your car to be towed to a repair shop. But suppose that you think you’re smarter than that, and you would like to solve the issue by yourself—or at least evaluate the repair cost. Vehicle breakdowns can occur for many reasons.

Intuitively, when facing a complex problem, we tend to test different solutions as soon as they come to our mind. When we understand that one solution won’t work, we will then look to test the next potential solution, and so forth. This is what we will call the one-factor-at-a-time approach, which is very intuitive, and very popular in companies across the globe when it comes to fixing complex quality issues. Parameters are changed and tested one at a time until the problem is fixed. It looks like this:

 …