A derating guideline is a set of parameters and associated values applied to Item types. In addition, parameter values to individual types within an Item type. For example, a default derating curve may be specified for PSR for all IC-Digital components, and a different derating curve for IC-Digital components with CMOS technology.

Another way to customize derating guidelines is to disable the parameters for individual types. The Derating Value definition dialog boxcontains the "Enable" check box which indicates that the specified parameter values are compared with actual values. If the check box is cleared, RAM Commander ignores the specified derating parameter. In this way, individual types can be filtered out from consideration in the derating analysis. The figure below illustrates how the Derating list reflects the way in which various derating parameters apply to different Item type types.

"D" (Disabled) in the second column indicates that RAM Commander ignores the Tj and Fanout parameters for all components in the IC-Digital Item type.

"E" (Enabled) indicates that RAM Commander uses the VinSR stress parameter on all IC-Digital components except for the TTL technology.

A dash in the "Techn" column indicates the default parameter value applied to all component types within the Item type; if a specific technology appears in this column, its parameter value overrides the default.