How are control limits calculated for an attribute np-chart?
An np-chart displays the number of nonconforming (defective) units. This chart is available in WinSPC to an attribute that is configured with an 'Attribute Counts' of 'Defective Units' and an 'Inspection Lot Size' of 'Fixed' (an np-chart requires that the lot size be constant). An attribute dis ...
How are control limits calculated for an attribute p-chart?
A p-chart displays the percentage of nonconforming (defective) units. This chart is available in WinSPC to an attribute that is configured with an 'Attribute Counts' of 'Defective Units'. An attribute displaying a p-chart in WinSPC (configured to recalculate the control limits every 5 subgroup ...