c Chart — Body-in-White Weld Defects
Twenty-four consecutive vehicle bodies inspected for weld defects on a constant area of opportunity, with Poisson limits at c̄ ± 3√c̄ and one body beyond the upper limit after a robot tip-dress was missed.
Make it your own.
title "Weld defects per body — BIW line 2"
chart c
unit "defects per body"
# Constant area of opportunity: every body carries 412 spot welds,
# so a plain count chart is the right tool — no denominator needed.
sample defects: 8
sample defects: 6
sample defects: 3
sample defects: 6
sample defects: 5
sample defects: 4
sample defects: 7
sample defects: 7
sample defects: 5
sample defects: 5
sample defects: 8
sample defects: 3
sample defects: 9
sample defects: 7
sample defects: 8
sample defects: 5
sample defects: 8
sample defects: 6
# Tip-dress cycle skipped on robot R12 during the shift handover.
sample defects: 17
sample defects: 9
sample defects: 7
sample defects: 10
sample defects: 9
sample defects: 5