Claim Missing Document
Check
Articles

Found 15 Documents
Search

ANALISIS PEREMAJAAN ANGKUTAN KOTA Studi Kasus : Angkot Trayek Margahayu Raya – Ledeng Hennie Husniah; Asep K. Supriatna
Sosiohumaniora Vol 5, No 2 (2003): SOSIOHUMANIORA, JULI 2003
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/sosiohumaniora.v5i2.5296

Abstract

Dalam paper ini dibahas suatu model matematika untuk peremajaan angkutan kota. Model yang dibentuk berupa model yang kontinu. Model kemudian diaplikasikan untuk menentukan umur ekonomis angkutan kota trayek Margahayu Raya – Ledeng di Bandung, dalam kaitannya dengan peremajaan angkutan kota yang bersangkutan. Lebih jauh lagi umur ekonomis yang diperoleh ini kemudian dibandingkan dengan berbagai skenario, seperti tingkat suku bunga yang berbeda, tingkat utilitas yang berbeda dan harga bahan bakar minyak yang berbeda. Kata kunci : Umur Ekonomis, Peremajaan Angkutan Kota
Potensi Kebijaksanaan Kontrak Pemeliharaan Mesin dalam Menunjang Keberhasilan Mekanisme Industri Pertanian Husniah, Hennie; S. Pasaribu, Udjiana; Halim, A.H.; Iskandar, B.P.
Jurnal Teknik Industri Vol 18, No 1 (2016): JUNE 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1535.372 KB) | DOI: 10.9744/jti.18.1.21-30

Abstract

In this paper we discuss a mathematical model of maintenance policy for certain type of agricultural equipments. It is assumed that the equipments are repairable and sold with two-dimensional warranty, i.e. a warranty with two scales of limit, such as the age of the equipment and the usage of the equipment. As an example in the case of automobile, the warranty is cease whenever the age of the automobile reaches 5 years or its mileage reaches 50.000 km, whichever occurs first. The model is intended to provide the best contract-based preventive maintenance (PM) strategy chosen from available options. A method to determine the optimal cost of service contract, both from user and producer view points, is presented. Numerical simulations reveal that the resulting optimal strategy depends on the level of the consumer usage pattern. In this paper we show that the selection of optimal policy is potential in supporting the performance of mechanization in agricultural industry in terms of choosing the best strategy to maintain agricultural equipments effectively (is able to reduce the failure rate of the equipment) with a minimal cost.
Analisis Dinamik pada Model Pengendalian Persediaan Dua Produk Berbeda dengan Kapasitas Produksi Terbatas Serta Inisiatif Tim Sales Bersama Anggriani, Nursanti; Lesmana, Eman; Supriatna, Asep; Husniah, Hennie; Yudha, Mochamad
Jurnal Teknik Industri Vol 17, No 1 (2015): JUNE 2015
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.17.1.17-26

Abstract

In this paper we discuss a mathematical model of inventory control policy based on local stability analysis using a system dynamics approach. It is assumed that the production capacity and the maximum production capacity has an upper limit but with sufficient availability of raw materials so that the production occurs continuously without stock out. The model is intended to meet the market equilibrium by determining the optimal number of agents in a team of salesman, the level of inventory, and the level of production capacity, so that thenet income is maximized. We use the Pontryagin Maximum Principle to find the optimal control of the system. Finally some numerical simulations are performed to give a sensitivity analysis of the inventory control policy to the parameters involved in the system.
A DYNAMICAL SYSTEM APPROACH IN MODELING TECHNOLOGY TRANSFER Husniah, Hennie; Sebrina, Sebrina; Supriatna, A. K.
Journal of the Indonesian Mathematical Society Volume 22 Number 1 (April 2016)
Publisher : IndoMS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jims.22.1.212.37-59

Abstract

In this paper we discuss a mathematical model of two parties technology transfer from a leader to a follower. The model is reconstructed via dynamical system approach from a known standard Raz and Assa model and we found some important conclusion which have not been discussed in the original model. The model assumes that in the absence of technology transfer from a leader to a follower, both the leader and the follower have a capability to grow independently with a known upper limit of the development. We obtain a rich mathematical structure of the steady state solution of the model. We discuss a special situation in which the upper limit of the technological development of the follower is higher than that of the leader, but the leader has started earlier than the follower in implementing the technology. In this case we show a paradox stating that the follower is unable to reach its original upper limit of the technological development could appear whenever the transfer rate is sufficiently high.  We propose a new model to increase realism so that any technological transfer rate could only has a positive effect in accelerating the rate of growth of the follower in reaching its original upper limit of the development.DOI : http://dx.doi.org/10.22342/jims.22.1.212.37-59
Cost analysis of warranty based on lemon law with multiple failures and total downtime Husniah, Hennie; K. Hermawan, K. Hermawan; B.P. Iskandar, B.P. Iskandar
INOVASI Vol 17, No 1 (2021)
Publisher : Faculty of Economics and Business Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (296.123 KB) | DOI: 10.29264/jinv.v17i1.9214

Abstract

Analysis of warranty costs is a topic that is widely studied in various finished product industries. One type of warranty that applies is a product warranty under Lemon Law. This guarantee under Lemon Law applies a lot to automotive products such as cars. Lemon Law is a law that protects consumers from poor quality new goods that are not in accordance with related product standards but can reach consumers. With this Lemon Law, consumers can return products that are proven to have a lemon condition in the hands of producers to then get a refund (replacement ) or replacement with a new similar product ( replacement ). The product can be claimed in a lemon condition if: (1) the car has been returned to the dealer four times because it needs to be repaired on the same problem / faulty part, but the dealer is unable to fix it satisfactorily; or (2) the car has been out of service for more than 30 days due to one or more damage. Analysis of warranty costs in this study includes replacement cases with compliance with conditions (1) only, replacement cases with fulfillment of conditions (2) only, and replacement cases with fulfillment of conditions (1) and conditions (2). A simulation method is designed to illustrate variations in the condition of the damage to the car during the warranty period as well as variations in repair time when damage occurs based on a particular distribution. The algorithm of the simulation is then modified and developed to determine the expected cost that fulfill the conditions (1) and (2).
Analisis Kegagalan Operasional Mesin Chiller dengan Metoda FTA dan FMEA Susilo, Aryudi; Rohimat, R Ismet; Husniah, Hennie
Integrasi : Jurnal Ilmiah Teknik Industri Vol 4, No 2 (2019): Integrasi : Jurnal Ilmiah Teknik Industri
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/js.v4i2.2871

Abstract

        Mesin air chiller adalah bagian dari sistem penyediaan dan penyediaan udara bersih dan dingin ke area bangunan. Kerusakan pada komponen mesin chiller telah mengurangi pasokan udara dingin ke area Mall. FTA (Fault Tree Analysis) dan FMEA (Failure Mode dan Effect Analysis) digunakan untuk melacak kasus-kasus kegagalan chiller engine, dengan penekanan pada analisis "pendekatan top-down", yang merupakan analisis menyeluruh mulai dari sistem tingkat atas dan meneruskannya turun, sehingga diharapkan dapat menjadi solusi yang tepat dalam menangani masalah pasokan udara dingin ke gedung Mall, dan dengan metode itu diharapkan juga dapat memberikan proposal dari penjadwalan pemeliharaan dengan membedakan perilaku penjadwalan sesuai dengan tingkat kritis dari masalah setiap unit komponen mesin chiller.
PARAMETER DETERMINATION INMANUFACTURING PROGRESS CURVE WITH THREE POINTS OF DATA Hennie Husniah; Asep K. Supriatna
STATISTIKA: Forum Teori dan Aplikasi Statistika Vol 4, No 2 (2004)
Publisher : Program Studi Statistika Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jstat.v4i2.883

Abstract

In this paper we discus a method to find the values of parameters in a manufacturing progress curve based on three pointsof data. In general to find better parameter estimation we need a lot of data. However, in some circumstances, the numbersof data are limited or even scarce, especially in the beginning of a manufacturing process. For this reason, we develop asimple method to determine the values of parameters if only three data are available. The curve we are dealing with is aninverse-like sigmoid that can describe a learning process in the beginning phase and has a lower bound in the long-termphase, hence a reasonably realistic curve.
Jurnal Pengabdian Penarapan Platform Pembelajaran Digital Baca Al-Qur’an Daring Di Pesantren Baiturrahman Ciparay KM. Syarif Haryana; Hennie Husniah; Octavia Maryanche; Denis Aji M. Jabar
Jurnal Pengabdian Tri Bhakti Vol 3 No 1 (2021): Jurnal Pengabdian Tri Bhakti
Publisher : Lembaga Pengabdian Kepada Masyarakat Universitas Langlangbuana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.615 KB) | DOI: 10.36555/tribhakti.v3i1.1719

Abstract

Responding to the Covid-19 pandemic encourages people to change their daily ways of thinking and behaving of education becomes the front line to break the chain of spreading Covid-19. Therefore, the policy of the central and local governments is to change the old learning patterns online. On the other, schools are expected to make adjustments to the implementation of this PSBB. Including the school under the guidance of the Baiturrahman Ciparay Islamic Boarding School, the education system for all subjects is converted into online including Al-Quran reading subjects at the Baiturrahman Islamic boarding school which is the flagship required to adjust the learning system so that curriculum targets can be achieved. However, the online method used in this subject has different demands because teachers and students have to face each other in an interactive, realtime manner. The solution applied is to take advantage of several Information Technology facilities so that students and teachers can take advantage of cellphones or notebooks in their respective places and simultaneously access the Google class application (Brock, 2015) to access various learning resources from teachers and Google Meet for materials that require face-to-face advance directly supported by multi media means
Model Dinamis Persediaan Tiga Produk dengan Penjualan Bersama Hennie Husniah; Asep K. Supriatna
Journal Industrial Servicess Vol 1, No 1 (2015): Oktober 2015
Publisher : Fakultas Teknik Jurusan Teknik Industri Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.684 KB) | DOI: 10.36055/jiss.v1i1.286

Abstract

Dalam makalah ini dibahas mengenai model sistem dinamik dari tingkat persediaan tiga jenis produk yang dijual secara bersamaan oleh sebuah tim pemasaran. Laju penjualan diasumsikan merupakan fungsi yang dipengaruhi oleh jumlah anggota tim pemasaran ini. Ketiga produk diasumsikan diproduksi dengan tingkat pertumbuhan produksi logistik (Verhulst) yang dimodifikasi, sehingga dapat mengakomodir berbagai bentuk pertumbuhan, seperti pertumbuhan hampir linier sampai dengan pertumbuhan sigmoid. Tingkat persediaan jangka panjang (steady state/long-term inventory level) untuk masing-masing produk dicari dan kestabilannya diperlihatkan untuk syarat tertentu. Kemudian juga beberapa contoh numerik diberikan sebagai ilustrasi dari sifat solusi sistem dinamis yang terbentuk.
Maintenance Contract With Imperfect Preventive Maintenance Hennie Husniah; B P Iskandar
Performa: Media Ilmiah Teknik Industri Vol 14, No 1 (2015): PERFORMA Vol. 14 No 1, Maret 2015
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.515 KB) | DOI: 10.20961/performa.14.1.11014

Abstract

In this paper, we study performance based maintenance contracts for heavy equipment operated in a mining industry. A performance based service contract uses an attractive incentives to motivate the agent to increase the maintenance effort such that the resulting equipment’s performance is well above the target. This will in turn give benefits for both the owner of the trucks and the Agent of service contract. In this paper, we study performance based maintenance service contracts for the equipment sold with warranty and the perfomances considered includes availability and safety measures. We find the optimal strategy (i.e. price of each contract and maintenance effort) for the agent and the optimal option for the owner using a non-cooperative game formulation