Freescale Semiconductor, Inc.
UCL
UCL
A
B
C
C
B
A
ZONE A (+ 3 SIGMA)
ZONE B (+ 2 SIGMA)
ZONE C (+ 1 SIGMA)
ZONE C (– 1 SIGMA)
ZONE B (– 2 SIGMA)
ZONE A (– 3 SIGMA)
CENTERLINE
LCL
LCL
Figure 5. Control Chart Zones
Figure 6. One Point Outside Control Limit
Indicating Excessive Variability
UCL
UCL
A
A
B
C
C
B
A
B
C
C
B
A
LCL
LCL
Figure 7. Two Out of Three Points in Zone A
or Beyond Indicating Excessive Variability
Figure 8. Four Out of Five Points in Zone B or
Beyond Indicating Excessive Variability
UCL
A
B
C
C
B
A
LCL
Figure 9. Seven Out of Eight Points in Zone C or
Beyond Indicating Excessive Variability
SUMMARY
Motorola’s commitment to STATISTICAL PROCESS
CONTROLS has resulted in many significant improvements
to processes. Continued dedication to the SPC culture will
allow Motorola to reach beyond Six Sigma and zero defect
capability goals. SPC will further enhance the commitment to
TOTAL CUSTOMER SATISFACTION.
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Motorola Sensor Device Data
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