PT Purinusa Ekapersada is a packaging product
company that is subsidiary of Sinarmas Group Company.
Sheets and cardboard boxes are the orders commonly
received by this company. Corrugator is the main
machine to produce sheet and cardboard boxes. Hotplate
part and Mechanical part are the main part of
corrugators machine. Applying both corrective
maintenance and preventive maintenance creates the high
defect cost and opportunity cost. This research is
proposed to decide the interval of maintenance based on
minimizing cost.
The research is done by the model that uses
software Maple V Release 5 Network Edition to find the
interval of maintenance and Microsoft Excel to validate
the result of maple software. Interval of maintenance
system is used for decide time of maintenance based on
cost minimization.
Analysis result shows the interval of maintenance
and the cost minimization. The interval for hotplate
part is 24 hours with cost Rp 196 and reduces 76.2%
from initial cost. The interval for mechanical part is
23 hours with cost Rp 45 and reduces 92.4% from initial
cost.