Page 191 - Lean six sigma demystified

170 Lean Six Sigma DemystifieD

n = 61 Total service and warranty calls by part
61 100%
53.375 90%
87% 80%
45.75 70% 70%
Number of calls 38.125 52% 60%

50%
30.5
40%
22.875
15.25 20 33% 12 11 10 30%
20%
7.625 8
10%
0 0%
Motor Vinyl Track T-Lock Door
Part
FIGURE 5-19 • Total service calls by part type.

FIGURE 5-20 • Repair types for motor.

n = 20 Motor service and warranty calls by type
20 100%
95%
17.5 90%
85% 80%
15 70%
Number of calls 7.5 11 55% 60%
12.5
10
50%
40%
5 6 30%
20%
2.5 2
1 10%
0 0%
Adjust Lube Install Replace
Type
FIGURE 5-21 • Motor service calls by type.