Complexity Failure Rate Data and Model Factors
The failure rate data and the factors to be used in the models given in equations (3.1) and (3.2) above are listed in
Table A-41 through
Table A-47 inclusive. For ease of use, the failure rate models, factors and the data tables appropriate to each category of device are summarised in
Table A-40. It should be noted that:
• For prediction purposes, SSI and MSI devices are grouped together because the same model and data apply to each.
• The Quality factor,
KQ (
Table A-41), is keyed to the BS 9000 and BS CECC screening level against which a device is procured. This level, and also the manufacturer’s name and product code, is given in PD 9002, “BS 9000 and BS CECC Qualified Products List”.