Question: 1.The time before a breakdown is normally distributed and has a mean of 4 weeks and a standard deviation of .7 weeks. The value of

1.The time before a breakdown is normally distributed and has a mean of 4 weeks and a standard deviation of .7 weeks. The value of z is -.84. What is the calculated preventive maintenance interval?

ANS 2.95 weeks
2.50 weeks
3.41 weeks
3.87 weeks

2.The degree to which an organization makes provisions for breakdowns often relates to which of the following?

ANS. How much physical space maintenance has to store inventories

The overall cost of equipment replacement

How important a piece of equipment is to the overall production system

How much preventive maintenance has already been performed in a given time period

What two costs are associated with maintenance?

ANSSupplier and customer cost

Repair cost and replacement cost

Breakdown cost and preventive cost

Lost production cost and maintenance cost

4. What may help to project future breakdowns?

Historical records

Operators who are able to deal with minor repairs

The amount of resources dedicated to maintenance

Maintenance staff who are able to diagnose problems

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