scholarly journals Lifetime Benefit Analysis of Intelligent Maintenance: Simulation Modeling Approach and Industrial Case Study

2021 ◽  
Vol 11 (8) ◽  
pp. 3487
Author(s):  
Helge Nordal ◽  
Idriss El-Thalji

The introduction of Industry 4.0 is expected to revolutionize current maintenance practices by reaching new levels of predictive (detection, diagnosis, and prognosis processes) and prescriptive maintenance analytics. In general, the new maintenance paradigms (predictive and prescriptive) are often difficult to justify because of their multiple inherent trade-offs and hidden systems causalities. The prediction models, in the literature, can be considered as a “black box” that is missing the links between input data, analysis, and final predictions, which makes the industrial adaptability to such models almost impossible. It is also missing enable modeling deterioration based on loading, or considering technical specifications related to detection, diagnosis, and prognosis, which are all decisive for intelligent maintenance purposes. The purpose and scientific contribution of this paper is to present a novel simulation model that enables estimating the lifetime benefits of an industrial asset when an intelligent maintenance management system is utilized as mixed maintenance strategies and the predictive maintenance (PdM) is leveraged into opportunistic intervals. The multi-method simulation modeling approach combining agent-based modeling with system dynamics is applied with a purposefully selected case study to conceptualize and validate the simulation model. Three maintenance strategies (preventive, corrective, and intelligent) and five different scenarios (case study data, manipulated case study data, offshore and onshore reliability data handbook (OREDA) database, physics-based data, and hybrid) are modeled and simulated for a time period of 20 years (175,200 h). Intelligent maintenance is defined as PdM leveraged in opportunistic maintenance intervals. The results clearly demonstrate the possible lifetime benefits of implementing an intelligent maintenance system into the case study as it enhanced the operational availability by 0.268% and reduced corrective maintenance workload by 459 h or 11%. The multi-method simulation model leverages and shows the effect of the physics-based data (deterioration curves), loading profiles, and detection and prediction levels. It is concluded that implementing intelligent maintenance without an effective predictive horizon of the associated PdM and effective frequency of opportunistic maintenance intervals, does not guarantee the gain of its lifetime benefits. Moreover, the case study maintenance data shall be collected in a complete (no missing data) and more accurate manner (use hours instead of date only) and used to continuously upgrade the failure rates and maintenance times.

Author(s):  
Sheila Nascimento Pereira de Farias ◽  
Norma Valéria Dantas de Oliveira Souza ◽  
Karla Biancha Silva de Andrade ◽  
Thereza Christina Mó y Mó Loureiro Varella ◽  
Samira Silva Santos Soares ◽  
...  

Abstract Objective: to analyze the Brazilian labor reform repercussions and its implications for nursing work. Method: this is an exploratory-descriptive case study. Data were collected on the website of four Regional Labor Courts (in Brazil), taking into account the cases judged in first and second instance, involving nurses and aspects of labor rights that were linked to labor reform. Results: two cases were captured that dealt with: 1) lack of prior inspection for unhealthy work; 2) expansion of nurses’ working hours without overtime pay. These two situations were based on the labor reform, which confirms the process of loss of rights for nurses. Conclusion: implementing the new labor rules brought harm and had negative repercussions for nursing work, as it resulted in professionals’ loss of rights. In this treadmill, it is believed that the dissatisfaction of these workers will increase and may result in professional evasion.


2005 ◽  
Vol 14 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Harriet B. Klein

This case study considers the phonological forms of early lexical items produced by 1 normally developing boy, from 19 to 22 months of age, who began to produce all monosyllabic words as bisyllabic. In order to link this empirical data (the apparent creation of increased complexity) with universal tendencies (motivated by the reduction of complexity), the functions of reduplication were revisited. Phonological processes (i.e., reduplication and final consonant deletion) are viewed as repairs motivated by 2 interacting constraints (i.e., constraints on monosyllabic words and on word-final consonants). These longitudinal case study data provide further evidence for a relationship between final consonant deletion and reduplication. A possible treatment approach for similar patterns demonstrated clinically is recommended.


1994 ◽  
Vol 5 (4) ◽  
pp. 363-378 ◽  
Author(s):  
Donald R. Hart ◽  
Marc A. Rosen

The potential environmental benefits of utility-based cogeneration are examined, using the energy system in Ontario, Canada, as a case study. Data are presented regarding fuel cycle emissions, environmental and health effects, and associated economic costs of the existing provincial energy system, as a basis for comparison to a more efficient energy system with utility production of useable steam and hot water. Estimates are presented of reductions in emissions, effects and environmental and health costs that could be achieved by the improved system. Costs associated with mortality, morbidity, lost work days, lost crop yield, lost fish yield and building damage are considered. The analysis suggests that utility cogeneration could reduce these costs by 10 to 45%, depending on the cogeneration scenario.


Author(s):  
Narsaiah Neralla

The demonetisation footstep by the Government of India twisted complicated influences in the economy. Complete sectors of the economy had faced and produced mixed sensation results over the decision of demonetisation. India’s financial services struggled with demonetisation; on the other hand demonetisation affects utmost over the banking sector because it is substantial influenced services to transform money circulation in an Indian economy. Eradicating components of currency notes from circulation in an economy is demonetisation. It is as the processes of components of money are denied the status of legal tender. Consequently, ceased currency notes will not be account as valid currency in an economy. The term ‘demonetization’ is an instrument to shrink Inflation, Black Money, Corruption and terror funding, this step discourages a cash dependent economy in India. Government of India drive towards demonetisation has given a strong push to the popularity of digital banking and made helps with the alternative arrangements of e-banking and e –wallet to trade and commerce. Exploring the demonetisation emergence in an economy and impact on banking services ecosystem dynamics, this study take an abductive approach anchored in over 4 years of case study data regarding. The present study foremost intention is to be analysing the demonetisation impact over banking loans and advances. In this regard the present study is to be examining the pre demonetisation and post demonetisation period.


2019 ◽  
Vol 1 (1) ◽  
pp. 119-125
Author(s):  
Mustamir Mustamir
Keyword(s):  

Permasalahan yang berkaitan dengan kemampuan mahasiswa selalu menjadi topik yang memerlukan perhatian terus-menerus dari berbagai kalangan. Banyak penelitian yang telah dilakukan sebagai upaya meningkatkan kemampuan mahasiswa, namun sebagian besar masih berlandaskan pada pendekatan kognitif semata. Berdasarkan  kajian teoritis, teori belajar yang lebih banyak memberikan peluang untuk berkembangnya potensi mahasiswa secara optimal adalah teori belajar humanistik. Metode penelitian yang digunakan dalam penelitian ini ialah metode pre-eksperimen dengan desain one shoot case study. Data yang diambil dan diolah adalah data  kemampuan atau pemahaman mahasiswa yang beruoa nilai perolehan mahasiswa dari mengerjakan tugas dan tes. Hasil penelitian menunjukkan bahwa kemampuan mahasiswa dalam perkuliahan ini berkisar pada nilai 4 atau nilai A dan nilai 3 atau nilai B. Secara keseluruhan, rata-rata kemampuan mahasiswa adalah 3,5 melebihi target, yaitu nilai 3. Semua mahasiswa terlihat aktif dan serius dalam mengikuti perkuliahan.


2020 ◽  
Vol 2 (1) ◽  
pp. 79-85
Author(s):  
L.Virginayoga Hignasari

The purpose of this research was to solve the problems related to the optimization of the customer service scheduling system in Indosat Ooredoo Office Kuta Branch by implementing the concept of graph coloring, namely the application of the Welch Powell algorithm. This research was a case study. Data obtained from observations and interviews. The data analyzed is a pre-existing customer service scheduling system. The scheduling system obtained will be analyzed further by using Welch Powell's algorithm to solve problems related to the formation of mobile selling teams and its schedule. Before being analyzed using the Welch Powell algorithm, the scheduling system is represented in graph form. There was a Welch Powell algorithm that is 1) Sort the vertices of G in decreasing degrees; 2) Use one color to color the first node (which has the highest degree) and other vertices that do not match the first node; 3) Start again with the next highest degree node in the ordered list that has not been colored and repeat the process of node transfer using the second color. Based on the results of the analysis, the number of existing customer services can be formed into three teams with alternating mobile selling schedules in one week. This is more efficient than the previous scheduling system that determined the mobile selling team based on the employee's work shift. Based on this, the implementation of the Welch Powell algorithm can solve the problem of scheduling system optimization in the Indosat Ooredoo Customer Service Division of the Kuta Branch theoretically.


Author(s):  
Zahid Parvez

Although efforts for developing e-democracy have been underway for over a decade, recent literature indicates that its uptake by citizens and Elected Members (EMs) is still very low. This paper explores the underlying reasons for why this is so from the perspective of local EMs in the context of UK local authorities. It draws on findings reported in earlier works supplemented with primary case study data. Findings are interpreted through the lens of Giddens structuration theory, which assists in drawing out issues related to three dimensions of human agency: communication of meaning, exercising power and sanctioning behaviour. The paper abstracts categories of agency from the findings and uses these to formulate eight propositions for creating an e-friendly democratic culture and enhancing EMs uptake of e-democracy. These propositions provide an indication for future e-democracy research direction.


2015 ◽  
Vol 4 (1) ◽  
pp. 33-42
Author(s):  
HERDIYAN MAULANA ◽  
MEI LESTARI SEKAR DININGRUM

This research aims to know the psychological well-being reflections on intimate-partner-violence-suffering wives who end up in a divorce. Subjects used in this research are two persons. Characteristic samples in this research are women aged 20-30 years who are divorced and have offspring. Research type is in the form of Research Qualitative Case Study. Data intake is the interview and observation methods. This interview is not only conducted to the subjects, but also to the respective significant person who is assumed the nearest to the subjects. Based on the research, Subject I is recorded to have supporting factors to psychological well-beings which are social supports, reflected appraisals, behavioral self-perceptions and religiousness. On the other hand, Subject II is recorded to have supporting factors to psychological well-beings like social supports, social comparisons, reflected appraisals, behavioral self-perceptions, religiousness, marriage motivation, economic factors and divorce age. In general, Subject I has lower level of psychological well-beings than those of Subject II.


2018 ◽  
Vol 2 (2) ◽  
pp. 451
Author(s):  
M. Ma'ruf
Keyword(s):  

Tujuan Penelitian ini adalah untuk membantu kepala sekolah dalam membangun dan membina kedisiplinan siswa melalui aktivitas keagamaan di sekolah. Dalam penelitian ini, menggunakan pendekatan Deskriptif Kualitatif dengan jenis penelitian Study Kasus (Case Study). Data dalam penelitian ini didapatkan dari observasi, interview dan dokumentasi. Hasil penelitian menunjukkan aktivitas keagamaan yang dilaksanakan di SMKN 1 Grati Pasuruan membangun kedisiplinan para siswanya sebab dirancang secara sistematis dengan bimbingan, pemberian informasi, pengawasan serta peningkatan kualitas para siswa pada aspek keagamaan, supaya tercipta sikap mental dan pengembangan potensi yang positif sehingga menjadi insan kamil, yakni mempunyai sikap akhlakul karimah dan memiliki keimanan serta ketaqwaan kepada Allah SWT. Dengan adanya kegiatan keagamaan ini, sangat membantu siswa untuk belajar disiplin dalam segala hal mulai dari disiplin masalah ibadah maka dengan begitu bukan masalah ibadah saja yang disiplin tetapi masalah belajar juga ikut disiplin. Adapun Aktivitas keagamaan yang dilaksanakan di SMKN 1 Grati Pasuruan terbagi menjadi tiga tahapan yaitu pertama : aktivitas harian yang terdiri dari shalat dhuha berjama’ah, sholat dhuhur berjama’ah dan program 6 S (Salam, Salim, Senyum, Sapa, Sopan, Santun) yang dilaksanakan setiap hari, kedua : aktivitas mingguan yang terdiri dari shalat jum’at berjama’ah, majlis ta’lim ( khusus untuk siswi perempuan ), dan pembacaan istighasah, dzikir, dan asmaul husna, ketiga : aktivitas pilihan yang terdiri dari ekskul al – banjari, BTQ ( Baca Tulis Qur’an ) dan qiro’ah.


2020 ◽  
Vol 4 (1) ◽  
pp. 15-28
Author(s):  
Moch Sya'roni Hasan ◽  
Mar’atul Azizah

This research to describe the strategy of Urwatul Wutsqo Islamic boarding school dealing with modernization challenges. The focus of his research is the strategy used by Al-Urwatul Wutsqo Islamic Boarding School deal with the challenges of modernization? 2). the activities forms of the Boarding School's deal with it. 3). the supporting and obstacle factors in the implementation it. This study is a qualitative approach in the form of case study. Data collection methods are done through interviews, observation and documentation. Data analysis techniques are data reduction, data display and verification. Al Urwatul Wutsqo's Islamic boarding school strategy dealing with modernization is providing integrated education of faith and piety in accordance with the Qur'an and Hadith. The activities are to love Allah and the hereafter is amal sholih, thariqah, recitation, istighatsah, etc.


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