110 ◾ Lean Management System LMS:2012
e. What preventive maintenance techniques does the organization use
to prevent unplanned downtime?
i. What computerized maintenance management system (CMMS)
supports the preventive maintenance system?
f. What procedures ensure that parts necessary for maintenance will
be available when they are needed?
i. Waiting for parts often contributes to unplanned downtime.
g. What is the policy toward so-called minor stoppages that result in
very little downtime?
i. National Semiconductor’s policy is that there is no such thing as
a “minor” stoppage (Gardner and Nappi, 2001). Such stoppages
may be symptomatic of more serious problems, and they always
waste time.
ii. It is worth restating Halpin’