Page 435 - Design for Six Sigma a Roadmap for Product Development

Requirements/design reviews Requirements/design reviews System integration and test System integration and test Installation and startup Installation and startup Detectable only once on line Detectable only once on line

Detection Code walkthroughs/unit testing Code walkthroughs/unit testing

Likelihood of occurrence 1 per 100 unit-years (1/50M) 1 per 10 unit-years (1/5M) 1 per 1 unit-year (1/525K) 1 per 1 unit-month (1/43K) 1 per week (1/10K) 1 per day (1/1440) 1 per shift (1/480) 1 per hour (1/60) 1 per 10 min (1/10) per min (1/1) 1

Severity of effect Cosmetic error—no loss in product functionality; includes Cosmetic error—no loss in product functionality; includes Product performance reduction—temporary; through timeout or system load the problem will “go away” after a period of time Product performance reduction—temporary;

The Software FMEA Rating incorrect documentation incorrect documentation until fixed without losing operation until fixed without losing operation some extent some extent reboot is required reboot is required

TABLE 11.5 Rating 1 2 3 4 5 6 7 8 9 10

398