Swapping out the word “system” for “product” in Gall’s Law gets us:
A complex product that works is invariably found to have evolved from a simple product that worked. The inverse proposition also appears to be true: A complex product designed from scratch never works and cannot be made to work. You have to start over, beginning with a working minimal viable product.
Note: A minimal viable product may or may not work.
Keep this mind as you build and design your MVPs.