The failure causes however, showed that human related failures also need to
be given special attention. Examples were lack of concentration and attention,
confusion of cables and wire, loose bolts and nuts, etc. This problem was
minimized as training and education in autonomous maintenance was
activated on weekly basis rather than monthly basis. Moreover, mechanical
failures were associated with failures of components such as gears, bearing,
jigs, and tooling. However, electrical failures were usually due to burnt relays
and fuses, starters, motors, power supply, and wiring as well. Equipment
deterioration and failure due to contaminated hydraulic oils was also
discovered especially during shift change. Therefore, technicians inspected all
checklists at workstations to ensure the lubricating and topping up hydraulic
oils were done sufficiently and correctly. Figure 2 depicts the breakdowns for
year 2006.