The process capability index can give three different conclusions.
A value of the process capability index equal to 1 indicates
that the process variability is very similar to the
specification limits. In this situation, it is said that the process
is minimally capable, since a small variation on any parameter
of the process can increase considerably the proportion of nonconforming
items. A value of the process capability index less
than 1 indicates that the process is considered unfit to produce
items according to the specification limits, i.e., a significant
proportion of nonconforming items is produced by the process,
and this implies that the process requires corrective
actions to solve this problem. Finally, it is said that the process
is capable of producing items within specification limits if the
The process capability index can give three different conclusions.A value of the process capability index equal to 1 indicatesthat the process variability is very similar to thespecification limits. In this situation, it is said that the processis minimally capable, since a small variation on any parameterof the process can increase considerably the proportion of nonconformingitems. A value of the process capability index lessthan 1 indicates that the process is considered unfit to produceitems according to the specification limits, i.e., a significantproportion of nonconforming items is produced by the process,and this implies that the process requires correctiveactions to solve this problem. Finally, it is said that the processis capable of producing items within specification limits if the
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