SMK TEMERLOH2. TEMERLOHKERTAS KERJA CADANGAN ORIENTASI ASRAMA SEK. Sempena kemasukan pelajar- pelajar asrama SMK Temerloh bagi sesi Januari 2. Youtube windows xp super loud. KERTAS KERJA MAJLIS ORIENTASI PELAJAR ASRAMA SMKDU 2012. Tujuan program ini diadakan untuk membantu murid-murid.

Kertas Kerja Program Sukan
Kertas Kerja Program Sekolah
Contoh Kertas Kerja Program
Kertas Kerja Program Kesihatan
Kertas Kerja Program Homeroom Asrama

Objektif – Mempertingkatkan kecekapan dan keberkesanan dalam penggunaan sumber manusia. Dalam program dan aktiviti pertubuhan-pertubuhan antarabangsa dan serantau; dan. Perjalanan dan Pengangkutan Murid Asrama.

KERTAS KERJA CADANGAN PROGRAM LAWATAN SAMBIL BELAJAR KE SHAH ALAM DAN MELAKA. KERTAS CADANGAN MODUL PEMBANGUNAN SAHSIAH, DISIPLIN DAN MORAL SMK SULTAN IDRIS SHAH II GERIK 1. PROGRAM: PEMANTAPAN DISIPLIN MURID 2. AKTIVITI: Mengadakan aktiviti-aktiviti seperti berikut:. Ikrar murid asrama. Sesi Membaca dan menghayati Buku Peraturan Asrama 3. MATLAMAT: Mengurangkan masalah disiplin dikalangan murid asrama.

Start display at page:

Download 'INTELLIGENT OPTIMAL REPLACEMENT MODEL FOR HOSTEL FACILITIES MAINTENANCE'

Jade Chapman
1 years ago
Views:

Transcription

1 Jilid : INTELLIGENT OPTIMAL REPLACEMENT MODEL FOR HOSTEL FACILITIES MAINTENANCE Yuseni Ab Wahab 1 & Abd Samad Hasan Basari 2 1 Kolej Universiti Islam Melaka 2 Universiti Teknikal Malaysia Melaka Abstract This paper is part of an on-going research on the development of intelligent optimal replacement model for Hostel facility maintenance in Malaysia where the case study is conducted at Kolej Universiti Islam Melaka (KUIM). The model is developed to analyze the total cost and downtime for various values of the uncertain parameter by using Artificial Intelligence (AI) method, namely, Ant Colony Optimization (ACO), noting the effect of this variation on the optimal solution. The decision areas addressed is based on the replacement action. The study is aimed to assist maintenance engineers in deciding an appropriate replacement policy. Kamus bahasa indonesia. This is usually useful to plot the total cost and downtime per unit time curve. The advantage of the curve is that, along with giving the optimal value, it shows the total cost and downtime around the optimum. If the curve is fairly flat around the optimum, it is not really very important that the maintenance engineers should plan for the replacements exactly at the optimum. However, if the curve rapidly decreased, then the maintenance decision should be made to find the optimal solutions. The result shows that the weeks to decide a replacement is during the semester break, which is suitable because students are not in the hostel. Keywords: Hostel facilities maintenance, intelligent optimal replacement model. 85

2 Jilid : MODEL GANTIAN OPTIMAL PINTAR BAGI PENYELENGGARAAN KEMUDAHAN ASRAMA Yuseni Ab Wahab 1 & Abd Samad Hasan Basari 2 1 Kolej Universiti Islam Melaka 2 Universiti Teknikal Malaysia Melaka Abstrak Kertas kerja ini adalah sebahagian daripada penyelidikan berterusan kepada pembangunan model gantian optimum pintar untuk penyelenggaraan kemudahan Asrama di Malaysia di mana kajian kes dijalankan di Kolej Universiti Islam Melaka (KUIM). Model ini dibangunkan untuk menganalisis jumlah kos dan downtime untuk pelbagai nilai parameter yang tidak menentu dengan menggunakan kaedah Kepintaran Buatan (AI), iaitu Ant Colony Optimization (ACO), menyatakan kesan variasi ini pada penyelesaian optimum. Kawasan keputusan ditangani adalah berdasarkan kepada tindakan penggantian. Kajian ini bertujuan untuk membantu jurutera penyelenggaraan dalam memutuskan dasar penggantian yang sesuai. Ini biasanya berguna untuk merancang jumlah kos dan downtime setiap lengkung unit masa. Kelebihan lengkung adalah bahawa, bersama-sama dengan memberi nilai yang optimum, ia menunjukkan jumlah kos dan downtime sekitar optimum. Jika lengkung adalah agak rata sekitar optimum, ia tidak benar-benar sangat penting bahawa jurutera penyelenggaraan perlu merancang untuk penggantian tepat pada optimum. Walaubagaimanapun, jika lengkung cepat menurun, maka keputusan penyelenggaraan perlu dibuat untuk mencari penyelesaian yang optimum. Hasil kajian menunjukkan bahawa minggu yang sesuai untuk membuat keputusan penggantian adalah semasa cuti semester kerana pelajar tidak berada di asrama Kata kunci: Penyelenggaraan kemudahan asrama, model gentian optimum pintar. 86

3 Intelligent Optimal Replacement Model for Hostel Facilities Maintenance Yuseni Ab Wahab & Abd Samad Hasan Basari 1.0 INTRODUCTION General, replacements will cost money in terms of component and a balance is required between the money spent for replacements and savings obtained to reduce the operating cost. Thus, this study aimed to determine an optimal replacement policy that will minimize the sum of operating, replacement costs and downtime per unit time. The goal of this research is to present a model that can be used to optimize component replacement decision. Equipment has followed through preventive replacement of critical component within the system. Thus, it is necessary to be able to identify which component should be considered for preventive replacement and which should be left to run until they fail. The primary goal addressed in this study is that to make a system more reliable through preventive replacement. 2.0 OPTIMAL PREVENTIVE REPLACEMENT An item, sometimes termed a line replaceable unit or part, is subject to sudden failure and when failure occurs, the item has to be replaced. Since failure is unexpected, it is not unreasonable to assume that failure replacement is more costly than a preventive replacement. For example, a preventive replacement is planned and arrangements are made to perform it without unnecessary delays, or perhaps a failure may cause damage to other equipment. In order to reduce the number of failures, preventive replacement can be scheduled to occur at specified intervals. However, a balance is required between the amount spent on the preventive replacement and their resulting benefits that is reduced failure replacements. The conflicting cost and downtime are happening and their resolution is by identifying the total cost and downtime curve. The replacement policy is one where preventive replacement is performed at fixed intervals of time. Failure replacement is needed whenever necessary and the optimal interval between the preventive replacement is determined to minimize the total expected cost and downtime when replacing the equipment per unit time. 2.1 Cost Model When dealing with optimization problems, in general, this study aimed to optimize some measure of performance over a long period. In many situations, this is equivalent to optimize the measure of performance per unit time. This approach is easier to formulate mathematically when compared to develop a model in optimizing a measure of performance over a finite horizon. The model construction is as follows. 87

4 Jilid : Construction of the Model: 1. c(t) is the operating cost per unit time at time t after replacement 2. C, is the total cost of a replacement. 3. The replacement policy /to perform replacements at interval length. 4. The objective is to determine the optimal interval between replacements to minimize the total cost of operation and replacement per unit time by using ACO. The total cost per unit C (t) for replacement at time t, is C(t)= total cost in interval (0,t) length of interval To use the equation c(t r ) = C(t r ), it requires that the trend in operating costs is an increasing function, which in practice is a very reasonable assumption. Any costs, such as production losses incurred due to the duration of the replacement which needs to be incorporated into the cost of the replacement action. Otherwise, a numerical solution is required as in Equation (1): C t r tr c t dt C 0 r (1) tr Tr Models are developed whereby, for particular assumptions, the optimal interval between the replacements can be obtained. In practice, there may consider difficulty in scheduling replacements to occur at their optimum time, or in obtaining the values of some of the parameters required for the analysis. 2.2 Case Study (Cost Model) The hostel building maintenance data are gathered from ICYM in a certain period of time. By using Eq (1), in discrete form, Table I is obtained from which it is seen that the optimal replacement age is 10 months, and the associated cost per month is MYR Table I also show the deteriorating trend from month 1 to 12 and increase again from 10 to 11.The associated graph of cost per month versus time is pr

Kertas Kerja Program Asrama