Page 85 - TPM A Route to World-Class Performance

66 TPM-A Route to World-Class Performance

1
OEE - Performance x - x Quality
-
I rate rate
Losses Changeover Adjustment
I

I
Problems Collapsed Damaged
impeller
bearings
1
Causes I I
Vibration Damaged
O-ring

Ask why I
five times

Solutions
I I I I
X Y Z

Figure 4.5 Problem-solving cascade

cyclone operation, which gives rise to a leaking seal problem, which results
in a breakdown, which affects the availability part of the OEE measurement.

4.2 Second principle: improve planned,
preventive maintenance
In the TPM improvement plan (Figure 3.19) this aspect is covered by steps 4
to 7 of the condition cycle. The key step is number 7, where the future asset
care regime is determined by the TPM team, and is based on the principles
illustrated in Figure 3.12.
The detailed approach to planned preventive maintenance will vary from
plant to plant and from industry to industry, but an effective prevention-
driven maintenance system is essential. However, unnecessarily intrusive
maintenance should be avoided. If the equipment is running smoothly and
no signs of defects or malfunctions are noticed in the daily routine of cleaning
and inspection or through condition monitoring, then it is pointless to strip
and rebuild the machine simply because it has been laid down as part of the
maintenance plan. Highly sophisticated sensors and software are available to