8 terms

Five

to calculate control limits 20 subgroups of ____ samples must be saved

Randomly Distributed Points

a process that is in control should exhibit: 1. most points should be near the middle 2. no points outside control limits 3. ___________ _______ ___________ (no pattern)

Jump Shift Pattern

nine points in a row either above or below the X-double bar line

Trend Pattern

six points in a row either steadily increasing or decreasing indicate a _____ _______.

Tool Wear

possible cause of a trend pattern in an X-Bar chart could be ____ ____, operator fatigue, change in coolant temperature

Cluster

grouping of points in one region of the chart away from the centerline

Stratification Pattern

all the points are near the middle of the chart

R Chart

the first step to analyze an X-Bar & R chart is to determine the the _ _____ is in control