0 - (Incomplete subgroups will
NOT be included in SPC calculations)

1 - (Incomplete subgroups will be
included in SPC calculations)

Default Value: 0

Enables masking of subgroups from being included
in calculations if the subgroup data is incomplete. Subgroups that
are not complete will have an effect on the accuracy of SPC
calculations. The magnitude of this effect is relative to the
number of subgroups on screen.