found that the best defense against major unexpected failures is to fail often. [༧ظ͠ͳ͍ॏେͳࣦഊʹର͢Δ࠷ળͷޚࡦɺසൟʹࣦഊ͢Δ͜ͱɻ] By frequently causing failures, we force our services to be built in a way that is more resilient” [සൟʹࣦഊΛҾ͖ى͜͢͜ͱʹΑͬͯɺαʔϏεͷϨδϦΤϯεΛΑΓڧ੍͢Δɻ]