Facility Maintenance

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Facility Maintenance
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Typical Job Categories for Maintenance   Plant
Maintenance

Typical Job Categories for Maintenance


Plant Maintenance

Electricians

Bricklayers

Heavy Movers

Tinsmiths

Painters

Window Washers

Welder
s

Glaziers

Janitors

Pipe fitters

Concrete Workers

Gardeners
Fire/emergency People

Carpenters

Steam fitters

Millwrights



Machine Maintenance

General Mechanics

Machinists

Sheet Metal Workers

Welders

Electronic Technician

Computer Technicians

General Mechanics Machinists Sheet Metal
Workers Welders Electronics Technicians Computer
Technicians
 
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MAINTENANCE PROCEDURES         Emergency
Maintenance         Preventative Maintenance
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(No Transcript)
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Emergency Standby Capacity
Probability that Number of Machines will be
broken Total 100
Cost to Rent Number of Machines Out of Order
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Cost of Repair-on-Breakdown

• We have a line with 50 robot GMA welders
• The cost to do a preventative maintenance
  overhaul on each machine is 200/machine
• Average breakdown repair costs are 700/machine
• Objective Calculate the cost if we elect to
  repair only when a machine breaks down. How much
  must we set aside each month?

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Probability of Breakdown as a function of months
after overhaul of all machines.
They Add to 100
The months time the probability results in the
partial expected time for failure.
Since the partial probabilities add to 100, the
partial times add to the expect time for a
failure 8.42 months
1.00
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The cost of repair-on-breakdown then
(700/machine) /(8.42 months) 50 machines
4157/month   Thus, we better place 4157 in a
fund every month if we decide to do
repair-on-breakdown policy.
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Preventative Maintenance

• We have a line with 50 robot GMA welders
• The cost to do a preventative maintenance
  overhaul on each machine is 200/machine
• Average breakdown repair costs are 700/machine
• Objective Calculate if preventative maintenance
  should be done and if so what the schedule should
  be.

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Calculate Cost for Preventative Maintenance For
every preventative maintenance overhaul we do it
will cost 200/machine 50 machines
10,000 If we do a preventative maintenance
every month, it will cost 10,000/month If we do
a preventative maintenance every 2 months, it
will cost 5,000/month, etc.
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Even though we do preventative maintenance, we
can expect some breakdowns to occur anyway. We
can calculate the number of expected breakdowns
each month using the following equation.  
Where Bn expected number of breakdowns N
number of machines Pn probability of machine
breakdown in period n
    That is, 2.5 breakdowns in the first month
    That is, 3.63 breakdown in first 2 months
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PLOT
Expected Cost Ave. Number 700/machine 2.5
700 1750
Total Cost Expected Cost Prev. Maint. Cost
1750 10000 11750
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4157
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Maintenance Homework