Application of Optimal Preventive Replacement Age Model to Determine Replacement Schedule For Dumping Grate Component on Boiler Machine (Case Study at Rejo Agung Baru Sugar Factory Madiun)
Abstract
Rejo Agung Baru Madiun is one of big sugar companies in East Java. One of the problems in this factory is delayed of production process caused by machine damaged. Based on preliminary survey, it showed that boiler machine is regularly damage and has the highest downtime. Moreover, component that influences the damage of boiler machine is dumping grate component. The main purpose of this research is to determine optimal replacement schedule that has minimum downtime and maximum availability of dumping grate component. Method that is used to solve the problem is optimal preventive replacement age model. Furthermore, it also determines and compares replacement cost before and after scheduling. From the result, it shows that the replacement interval for dumping grate is 555 hours or 23.125 days with the minimum downtime value is 0.010018182 and the availability value is 0.989981818. Total cost of optimal replacement scheduling is Rp 3,341,078,529.00. The cost comparison before replacement scheduling and after replacement scheduling is Rp 3,517,399,429.00 and Rp 3,341,078,529.00 respectively or saving about 5.013%.
Keywords: dumping grate, minimum downtime, maximum availability, optimal preventive replacement age model
Downloads
Published
Issue
Section
License
Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal