The picture to the left is the flight of the last Titan IV launch vehicle. I was outside the SCIF, but got to see everything up the 2nd stage separation.
The Martin Company’s launch vehicle built a five-decade legacy goes back to the earliest rockets designed and built in the United States. The Intercontinental Ballistic Missile (ICBM) program; Project Gemini, NASA’s 2nd human spaceflight program; Mars Viking landers; Voyager deep space probes; communications and reconnaissance satellites—all of these programs and more relied on the Titan for a safe and dependable launch.
The final version flew when the program was retired after delivering National Reconnaissance Office payload to orbit on October 19, 2005. A total 368 Titans were flown, with capabilities ranging from Earth reconnaissance and military and civil communications to human and robotic exploration.
In this domain, failure is not an option. Many would correctly say, failures were found before use. And that is correct, Design, Development, Test, and Evaluation (DDT&E) is the basis of must work when commanded to do so when commanded to do so.
In domains without the needed capability that must perform on demand - fail fast and fail often may be applicable.
Choose domain before suggesting a process idea is applicable