Acoustat6...I am not a Trekie, so I never heard the Scotty/Spock statment. But it's so true.
This axiom was promulgated back in the 50's by a Japanese engineer, Tagushi, who was a disciple of the great American QC expert Dr Edward Deming. Post war Japanese industry, notibly Toyota and Sony, had adopted the philosophy, and look what it did for them. In practice I learned this lesson in my work on missile guidance systems. Back in the 60's our electronics had lots of precision components, many selected-value components, and even a few pots. Over the years, as performance requirements on the GS tightened up it became evident that, cost asside, it was simply impossible to meet them by using more and more precise (exotic) components in the circuitry. Today it is a requirement on the design of the GS that it not rely on components of unusual precision, and have no selected components or pot adjustments. This puts an additional burden on the designer, but in the end it results in a system having superior performance, and reliability.