The authors put up this diagram. It shows the traditional view of a problem solving process. This should be pretty familiar to any kind of consultant. It shows four stages of problem solving: gather data, analyze data, formulate solution, implement solution. Apparently, this is called the waterfall model of problem-solving, where we move graciously from the area of looking at the problem to that of working out the answer.



A study at the Microelectronics and Computer Technology Corporation (MCC) looked at whether this model is a good description of what happens in the real world. So they took a team of successful designers and set them to work on a real world problem (designing an elevator control system). They then looked at how one designer actually spent his time. That's then plotted over our waterfall here:



That's interesting isn't it? He's clearly not following the script. Instead, he's jumping to a potential solution and then realising another aspect of the problem and so on. Here's someone who allegedly is a good designer and he's not doing "the right thing".