Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Journal of Engineering and Technological Sciences Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri
Bermawi P. Iskandar
Fakultas Teknik, Departmen Teknik Industri, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40132
Engineering Industrial & Manufacturing Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Optimal Overhaul-Replacement Policies for Repairable Machine Sold with Warranty Soemadi, Kusmaningrum; Iskandar, Bermawi P.; Taroepratjeka, Harsono
Journal of Engineering and Technological Sciences Vol 46, No 4 (2014)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (810.73 KB) | DOI: 10.5614/j.eng.technol.sci.2014.46.4.9

Abstract

This research deals with an overhaul-replacement policy for a repairable machine sold with Free Replacement Warranty (FRW). The machine will be used for a finite horizon, T (T <), and evaluated at a fixed interval, s (s< T). At each evaluation point, the buyer considers three alternative decisions i.e. Keep the machine, Overhaul it, or Replace it with a new identical one. An overhaul can reduce the machine age virtually, but not to a point that the machine is as good as new. If the machine fails during the warranty period, it is rectified at no cost to the buyer. Any failure occurring before and after the expiry of the warranty is restored by minimal repair. An overhaul-replacement policy is formulated for such machines by using dynamic programming approach to obtain the buyer’s optimal policy. The results show that a significant rejuvenation effect due to overhaul may extend the length of machine life cycle and delay the replacement decision. In contrast, the warranty stimulates early machine replacement and by then increases the replacement frequencies for a certain range of replacement cost. This demonstrates that to minimize the total ownership cost over T the buyer needs to consider the minimal repair cost reduction due to rejuvenation effect of overhaul as well as the warranty benefit due to replacement. Numerical examples are presented for both illustrating the optimal policy and describing the behavior of the optimal solution.
Pengembangan Model Consignment Stock pada Sistem Rantai Pasok Dua Eselon dengan Permintaan Berfluktuasi dan Perubahan Order Awal Ivan D. Wangsa; Bermawi P. Iskandar
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 15 No. 1 (2013): JUNE 2013
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1026.202 KB) | DOI: 10.9744/jti.15.1.1-12

Abstract

Scheduling changes on the production floor are common in practice to meet the consumer demand and these cause the nervousness. The nervousness in turn will result in increased costs and reduced service level. This research deals with  production batch size and buffer stock taking into account changes in a preliminary order. Change in the demand for a given day is announced one day before and this is viewed as it occurs randomly. This research was considered in two echelon supply chain system with a single supplier and single manufacturer. The development of model is transactional relationship and consignment stock contract relationship. This study also considers the backorder and production capacity according to the real condition. Numerical examples are given to demonstrate the performance of the models. From the numerical results, it appears that coefficient variation (CV) of the demand affects the results obtained using method of SM and LUC.
Co-Authors A. Hakim Halim Abdul Hakim Halim Ahmad S. Indrapriyatna Andi Cakravastia Docki Saraswati Harsono Taroepratjeka Ivan D. Wangsa Ivan D. Wangsa Kusmaningrum Soemadi Sukoyo Sukoyo Suprayogi Suprayogi TMA Ari Samadhi