scope:

Abstract:

The root cause of the MCO mission loss was an error in the "Sm_forces" program output files, which were delivered to the navigation team in English units (pounds-force seconds) instead of the specified metric units (Newton-seconds). Comply with preferred software review practices, identify software that is mission critical (for which staff must participate in major design reviews, walkthroughs and review of acceptance test results), train personnel in software walkthroughs, and verify consistent engineering units on all parameters.