
Satoshi Amagai’s Blog : Failure Rates
One of the projects I was assigned in my first year at Sony was “failure rate prediction.” It’s been over 45 years, so my memory is quite fuzzy, but I believe the assignment was something along the lines of: “Develop a parameter analysis program to ensure that at least 95% of products pass inspection with 95% accuracy when exporting new products to the U.S.” Back then, there weren’t any decent off-the-shelf software packages available, so I basically wrote the program from scratch myself using the FORTRAN programming language. Also, since personal computers were not supplied to employees, I first wrote the rough program on paper, then go to a place









