WHEN BIG SYSTEMS FAIL, THE FAILURE IS OFTEN BIG - John Gall

success is largely a matter of Avoiding the Most Likely Ways to Fail[d. ], and since every Bug advances us significantly along that path, we may hearken back to the advice given in the Preface and urge the following Policy: CHERISH YOUR BUGS. STUDY THEM But

Loose systems last longer and function better.

A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over, beginning with a working simple system.