Simulation of preventive maintenance schedule in reducing machine stoppage and downtime
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Date
2018-06
Authors
Mak, Kam Sheng
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Abstract
In the past several decades, there have been diverse and significant research
activities on maintenance scheduling. Machines are usually down periods due to plenty
of reasons such as preventive maintenance activities. Preventive maintenance is defined
as regularly scheduled maintenance actions based on the average failure rates. An
optimize implemented preventive maintenance strategy can provide many benefits to
an organization in terms of extending equipment life and machine availability. Few
researches have addressed the issues of preventive maintenance. For instances, proper
preventive maintenance scheduling can maximize the machine lifecycle and production
throughputs.
In this thesis, the objective is to study the machine availability that affected by
the preventive maintenance scheduling. The model was developed based on the Surface
Mounted Technology (SMT) in manufacturing system. The SMT line is a continuous
flow production line since every machine are connected in line. In this research, the
model that has been build consists of five different machine which is screen printer,
glue dispenser, chip shooter, pick and place and reflow oven. WITNESS 14
Manufacturing Performance Edition software was used to imitate the Surface Mounted
Technology (SMT) production system. This is to carry out the optimisation of
preventive maintenance scheduling by using different breakdown intervals and
preventive maintenance duration.
Results of simulation study comparing the availability of machine with different
preventive maintenance scheduling. The total system availability was calculated since
the SMT line is continuous flow production. The findings of this project shown that the
optimise preventive maintenance should be done every one week with 30 minutes PM
duration.