Never. Complementary regulations (varies by location and industry) define methods and procedures, validations and control, based on statistics where necessary,

Never. Complementary regulations (varies by location and industry) define methods and procedures, validations and control, based on statistics where necessary, for assuring an accceptable level of risk of failure (never zero but very very small) in balance of resource use. Errors might be introduced in any stage of realization of an engineering product from concept to delivery (including calculation errors, misuse of methods and tools, etc.) but we could prepare for know - and to some extent unknown - sources of trouble implementing assurances and validations, approvals and checkups, coupled with criminal accountibility. What comes out of a FEA software (which could have bugs, which could have been misused, using wrong data, etc.) will never be realized without scrutiny. Even the scrutiny and validation methods can have errors in it so redundancy is expected but straight delivery of FEA calculations (actually any stage of the process) into production without checks can be considered as criminal neglect (of which is impossible to eliminate like any other crime).