I have come to think of the Simple domain as the Enabling domain. However, most of our clients enjoy the excitement of the Complex domain, and dismiss the Simple domain as necessary though dull, but this is too shortsighted.
If we manage them correctly, activities in the Simple domain enable us to spend more time and resource in the other domains, but if we get it wrong, there are huge negative consequences that can disable the resources allocated to growing and driving the business. Consequently, the greater the negative impact of failure of Simple systems, the greater should be our vigilance in ensuring that sensors are in place to pick up weak signals and hence avoid catastrophe.
We don’t often talk about weak signals in the Simple domain, but I believe they exist.