Specifications

A
General assumptions
95
General assumptions
• Componentfailureratesareconstant.
•Board‐to‐systeminterconnectsareincludedwithinestimates.
•Non‐electricalcomponents(screws,mechanicallatches,labels,covers,etc.)arenot
includedinestimates.
General notes
•MethodI,CaseI=Basedonpartscount.Equipmentfailureisestimatedbytotaling
devicefailuresratesandquantitiesused.
• QualityLevelII=Devicespurchasedtospecifications,qualifieddevices,vendorlot‐to‐
lotcontrolsforQLsandDPMs.
Whereavailable,directcomponentsupplierpredictionsoractualFITrateshavebeen
used.