Tag Archives: maintenance

Maintenance System

بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ

EFNMS (European Federation of National Maintenance Societies) Definition :

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Maintenance is all actions which have the objective of retaining or restoring an item in or to a state in which it can perform its required function. These include the combination of all technical and corresponding administrative, managerial, and supervision actions.

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Perawatan adalah adalah semua tindakan yang bertujuan mempertahankan atau mengembalikan item dalam atau menjadi kondisi agar dapat melakukan fungsinya sesuai yang diperlukan. Termasuk kombinasi dari tindakan-tindakan teknis serta administratif, manajerial, dan pengawasan yang terkait.

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Approximation Bias Evaluation of The Number of Corrective and Preventive Maintenance Activities

APPROXIMATION BIAS EVALUATION OF THE NUMBER OF CORRECTIVE AND PREVENTIVE MAINTENANCE ACTIVITIES
Author : ARIF RAHMAN

Abstract : Implementing preventive maintenance strategies, the maintenance management still meets risks of equipment failures before preventive maintenance is conducted. To determine the preventive maintenance schedule, it concerns with reliability and failure probability of the equipment. The shorter preventive maintenance period, it improves higher reliability and lower failure probability. This study evaluates three approximations that estimate the number of corrective and preventive maintenance activities over a period of time. It uses three scenarios of preventive maintenance periods, specifically: the 10th percentile, the 90th percentile and the average. It evaluates the approximation bias using three methods, namely: Deductive Reasoning, Inductive Reasoning and Montecarlo Simulation. The results show that the third approximation method has the lowest bias.
Keywords : The Number of Maintenance Activities, Approximation, Bias Evaluation, Deductive Reasoning, Inductive Reasoning, Montecarlo Simulation

EVALUASI DEVIASI DARI APROKSIMASI FREKUENSI KEJADIAN PERAWATAN KOREKTIF DAN PREVENTIF

Abstrak : Dalam manajemen perawatan yang menerapkan strategi perawatan preventif, masih tetap mempunyai resiko terjadinya kegagalan sebelum perawatan preventif dilaksanakan. Penentuan interval waktu perawatan preventif berkaitan dengan nilai keandalan dan probabilitas kegagalan dari alat yang dirawat. Semakin pendek interval waktu perawatan preventif, maka nilai keandalan semakin tinggi dan probabilitas kegagalan semakin rendah. Namun hal ini juga berdampak pada meningkatnya frekuensi perawatan preventif dan menurunnya frekuensi perawatan korektif. Penelitian ini mengevaluasi tiga metode aproksimasi yang dapat digunakan untuk mengestimasikan frekuensi kejadian perawatan korektif dan frekuensi kejadian perawatan preventif dalam selang waktu tertentu. Interval waktu perawatan preventif menggunakan tiga skenario, yaitu persentil 10, persentil 90 dan rata-rata. Evaluasi deviasi mempergunakan tiga cara, yaitu: Deductive Reasoning, Inductive Reasoning dan Simulasi Montecarlo. Berdasarkan ketiga cara evaluasi deviasi pada ketiga metode aproksimasi dengan tiga skenario, menunjukkan bahwa metode aproksimasi yang ketiga mempunyai deviasi yang paling rendah.
Kata Kunci : Frekuensi Kejadian Perawatan, Approksimasi, Evaluasi Deviasi, Deductive Reasoning, Inductive Reasoning, Simulasi Montecarlo


The paper has been published in Conference Proceeding (Prosiding Seminar Nasional Terpadu Keilmuan Teknik Industri, 2017, pp.C.181-C.186, Malang)
The copy is available to download on Research Gate

Simulation Study Of Spare Part Inventory System Based On Compound Poisson Process Approach

SIMULATION STUDY OF SPARE PART INVENTORY SYSTEM BASED ON COMPOUND POISSON PROCESS APPROACH
Authors : ARIF RAHMAN, Bambang Indrayadi & Novi Tria Susanti

Abstract : Spare part inventory system become an important thing in maintenance management. Availability of spare parts will support maintenance activities, since spare part shortage will increase equipment downtime. The lag time between occurence of spare part request are uncertain and the amount of consumption varies each request. Continue reading

Software Prototype Of Preventive Maintenance Information Systems For Small Medium Industries

SOFTWARE PROTOTYPE OF PREVENTIVE MAINTENANCE INFORMATION SYSTEMS FOR SMALL MEDIUM INDUSTRIES
Authors : Mochamad Choiri, Purnomo Budi Santoso & ARIF RAHMAN

Abstrak : Equipments and other production facilities are critical elements to ensure production sustainability. It must conduct maintenance to maintain equipment reliability, so it will perform optimum state. Information technology can provide a usefull tool for asset and maintenance management to record the failures and the maintenance activities in database. Continue reading