This is 100% not the Dunning-Kruger effect. How on Earth would it be?
edit - from wikipedia: In the field of psychology, the Dunning–Kruger effect is a cognitive bias in which people assess their cognitive ability as greater than it is.
edit - from wikipedia: In the field of psychology, the Dunning–Kruger effect is a cognitive bias in which people assess their cognitive ability as greater than it is.
I interpreted GP as saying the aforementioned management has just enough cursory knowledge to want to apply the same hammer that worked on a simple system to that on a complex system, but not enough knowledge to realize the unknown-unknowns that they aren't even aware of.