Figure 5.1 TPM improvement plan: three phases and nine steps

1 Restore before improve.

2 Pursue ideal conditions.

3 Eliminate minor defects.

4 Prevent causes of dust, dirt and scattering.

5 Ask why five times:

• Why don't we know the true consequences of failure (both obvious and hidden)?

• Why does this part of the process not work as it is meant to?

• Why can't we improve the reliability?

• Why can't we set the optimal conditions for the process?

• Why can't we maintain those optimal conditions?

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