scholarly journals Considerations regarding the variables of the ship repair process in the shipyards

2021 ◽  
Vol XXIV (1) ◽  
pp. 193-200
Author(s):  
MANEA E.
Keyword(s):  
Case Studies ◽  
Technical Specification ◽  
Repair Process ◽  
Total Period ◽  
Repair Work ◽  
Retention Period ◽  
Independent Variables ◽  
Number Of Factors ◽  
Random Variability ◽  
Ship Repair

The ship repair process in shipyards is a complex one and its components are usually influenced by a significant number of factors with random variability. The retention period of a ship in the shipyard for repair works present a particular interest, both for the shipyard and for the beneficiary of the repair works. In the most general way, the variables that could be the basis for the prognosis of the total period of repair works are selected from the content of the technical specification of works prepared by the owner / technical manager of the ship.. The paper highlights some independent variables that can be taken into account when estimating the period of repair work. The case studies presented in the paper refer to a portfolio of 400 tank type ships for which repair works were carried out in the Constanta Shipyard.

Anglican Inter-Faith Relations from 1910 to the Twenty-First Century

2017 ◽  
Author(s):  
Paul Hedges
Keyword(s):  
Middle East ◽  
Case Studies ◽  
Historical Development ◽  
First Century ◽  
Sri Lankan ◽  
Historical Overview ◽  
Number Of Factors ◽  
Twenty First Century

This chapter explores the development of Anglican inter-faith relations since 1910 which has been shaped by a number of factors including: the ecumenical context, changing dynamics within the global Communion, globalization issues, and moves from mission to dialogue. The chapter begins with a historical overview and traces developments in key Anglican Communion texts and meetings, especially in recent times the Lambeth Conferences of 1988, 1998, and 2008. The ecumenical context which has shaped thought on inter-faith relations in this period is also given strong attention. The chapter concludes with two case studies. The first explores relations with Buddhism in the Sri Lankan context, while the second looks at relations with Islam focusing on the Middle East. While charting some general trends, it is noted that very different dynamics and varying standpoints exist in Anglican attitudes on inter-faith relations and have been part of the historical development throughout the period surveyed.

Modeling of the Economic Development of a Region

2011 ◽  
pp. 260-280
Author(s):  
Renáta Myšková ◽  
Ivana Linkeová
Keyword(s):  
Economic Development ◽  
Fuzzy Sets ◽  
Case Studies ◽  
Regional Economic Development ◽  
Economic Risk ◽  
Microsoft Excel ◽  
Regional Economic ◽  
Number Of Factors ◽  
Strategic Factors ◽  
Official Data

The economic development of a region depends on a number of factors which influence it mainly bases in a macro-economic aspect. Each region has its specific characteristics, thus area-surveyed indicators may not have sufficient predicative potential. In this chapter the authors design two new indicators (Index of Citizens’ Financial Provision and Risk of Regional Economic Development) which enable them to evaluate the financial provision of citizens and the economic risk of a region in more detail. Consequently the authors can, through the course of designing these indicators, determine the rate of their influence on a region or at least predict their development. In order to create and model these indicators the authors used tools from the Microsoft Excel program. The methodology described can be widely utilized, as partial indicators can be substituted and, therefore, it is possible to evaluate other strategic factors of the region under consideration. Indicator Risk of Regional Economic Development was designed with the help of fuzzy sets. The chapter includes two case studies, which are based on official data provided by the Czech Statistical Office. The purpose was to illustrate the construction of indicators, their predicative value and modeling potential.

scholarly journals EFFECT OF MUDARABAH AND MUSHARAKAH FINANCING ON RETURN ON EQUITY (ROE) CASE STUDIES ON ISLAMIC COMMERCIAL BANKS IN INDONESIA FOR THE PERIOD 2015-2019

2021 ◽  
Vol 8 (3) ◽  
pp. 255
Author(s):  
Ghitha Millatina Islamiyati ◽  
Nana Diana
Keyword(s):  
Case Studies ◽  
Commercial Banks ◽  
Statistical Test ◽  
Coefficient Of Determination ◽  
Financial Reports ◽  
Return On Equity ◽  
Purposive Sampling ◽  
Independent Variables ◽  
Simultaneous Test

ABSTRAKTujuan dari penelitian ini adalah untuk mengetahui apakah pembiayaan mudharabah dan pembiayaan musyarakah berpengaruh terhadap Return On Equity (ROE) studi kasus pada Bank Umum Syariah di Indonesia periode 2015-2019. Populasi dalam penelitian ini adalah seluruh data dalam laporan keuangan yang terdapat pada Bank Umum Syariah di Indonesia dan didapat sampel dari hasil purposive sampling sebanyak 9 Bank Umum Syariah dengan variable bebas yaitu pembiayaan mudharabah (X1) dan pembiayaan musyarakah (X2) serta variabel tetap yaitu Return On Equity (ROE) (Y). Metode penelitian yang digunakan yaitu analisis deskriptif, uji asumsi klasik yang terdiri dari uji normalitas, uji heteroksiditas, uji multikolinearitas dan uji autokorelasi juga uji hipotesis yang terdiri dari uji statistic t untuk menguji secara terpisah, uji statistic F untuk menguji secara bersama dan koefisien determinasi (R2). Hasil penelitian menjelaskan bahwa secara terpisah, Return On Equity (ROE) tidak dipengaruhi oleh pembiayaan mudharabah maupun pembiayaan musyarakah.. Pada uji secara bersama-sama, Return On Equity (ROE) tidak dipengaruhi oleh pembiayaan mudharabah dan pembiayaan musyarakah studi kasus Bank Umum Syariah di Indonesia periode 2015-2019.Kata Kunci: pembiayaan mudharabah, pembiayaan musyarakah, return on equity ROE), bank umum syariah. ABSTRACTThe intention of this research is to reveal whether mudarabah and musharakah financing have an effect on the return on equity (ROE) case studies on Islamic Commercial Banks in Indonesia period 2015-2019. The population in this research is all data in the financial reports contained in Islamic Commercial Banks in Indonesia and obtained samples from the purposive sampling of 9 Islamic Commercial Banks with independent variables, namely mudarabah financing (X1) and musharakah financing (X2) and dependent variable namely return on equity (ROE) (Y). The research method used are analysis of descriptive, test of classic assumption which contains test of normality, heteroxidity test, multicollinearity test and autocorrelation test as well as hypothesis testing which includes t statistical test to test partially, statistical F test to test simultaneously and the coefficient of determination (R2). The results of the research explain that partially, return on equity (ROE) has no effected by mudarabah financing and musharakah financing. In the simultaneous test, return on equity (ROE) has no effected by mudarabah financing and musharakah financing in case study of Islamic Commercial Banks in Indonesia for the 2015-2019 period. Keywords: Mudarabah financing, musharakah financing, return on equity (ROE), Islamic commercial bank.

scholarly journals Assessments regarding the planning and control of activities and resources for ship repair and maintenance works

2021 ◽  
Vol XXIV (1) ◽  
pp. 201-210
Author(s):  
MANEA E.
Keyword(s):  
Critical Path ◽  
Technical Specification ◽  
Resource Planning ◽  
Time Parameter ◽  
Complex Issue ◽  
Planning And Control ◽  
Resource Requirements ◽  
Points Of View ◽  
And Control ◽  
Ship Repair

The repair and maintenance operations carried out within a shipyard are correlated with the process of ensuring and managing the resources necessary to carry out the works included in the technical specification. Resource planning is a complex issue that can be addressed from several points of view. Initially, the planning of activities is done taking into account only the analysis of the time parameter and the dependencies between activities imposed by the technological process. The practice of the activities carried out in a shipyard has demonstrated that an analysis of the necessary resources according to the existing availability is also necessary. There are many unforeseen situations that can affect both the time of work and resources (material, financial, human) thus complicating the process of planning activities. This paper proposes a way to analyze the resource requirements of a repair project based on available resources, through Critical Path Method diagrams. This provides a comparative view of the daily required profile for a particular resource associated with the project in respect to the daily available profile of the shipyard.

Customer’s Waste at Dry-docking

2015 ◽  
Author(s):  
Ahmed Samir Ghowel
Keyword(s):  
Case Studies ◽  
Analytical Methods ◽  
Project Manager ◽  
Point Of View ◽  
Short Period ◽  
Different Types ◽  
Dry Dock ◽  
Work Done ◽  
Ship Repair

Dry docking is a short period of time where a ship is placed inside a dry dock to finish a list of integrated jobs. During this period, any non-value work, generated by the Shipyard, is consider a waste of time and cost from the customer’s perspective. Different studies were made early to differentiate between value and non-value work done by the shipyard from the customer point of view. However author founds that, there are other different types of waste that generated by the customer himself which affects the project course. Therefore the burden of maximizing value and minimizing waste should be carried by the customer before the shipyard. And the shipyard in return should ensure that, because the loss impact on the shipyard will be more than on the customer. Case studies are utilized to demonstrate the customer’s waste and its impact on the shipyard during dry-docking. Showing the wastes from the shipyard’s perspective, instead of the customer’s, will enhance the customer’s scope and profit at the end of dry-docking. This will be guided by analytical methods to show, in figures, the owner’s loss and profit. The author’s objective, as project manager in a well-known shipyard, is to illustrate what is done and what should be done from the customer’s side to initiate and enforce Lean Ship repair. This paper explores the waste from the shipyard’s perspective, which if adopted by the customer, lean repair will be working in parallel on both sides.

scholarly journals Shipbuilding and Ship Repair Workers around the World. Case Studies 1950-2010

2017 ◽  
Author(s):  
Raquel Varela ◽  
Hugh Murphy ◽  
Marcel Linden, van der
Keyword(s):  
Case Studies ◽  
The World ◽  
Ship Repair

Concrete Crack Repair with Polymer Modified Materials - The Need for Specialized Training of Applicators, Suppliers, Consultants and Clients

2015 ◽  
Vol 1129 ◽  
pp. 409-415
Author(s):  
Jannes Bester ◽  
Deon Kruger
Keyword(s):  
Material Selection ◽  
Repair Process ◽  
Patch Repair ◽  
Correct Selection ◽  
Concrete Repair ◽  
Repair Work ◽  
Adequate Knowledge ◽  
Concrete Crack ◽  
Repair Materials ◽  
Level Of Training

Concrete repair with polymer modified materials has become an integral part of the civil construction industry. Often, under-performance or even failure of such repairs can be attributed to the incorrect selection, preparation, application or care of the repair process. The root cause of this is basically the lack of adequate knowledge and understanding of the repair material and the repair process by the applicator, the supplier, the consultant and the client. Unfortunately, it seems that there is very little done in terms of the training of these four stakeholders. Decisions regarding repair materials and processes are often based on personal preferences, an elementary cost analysis and convincing sales pitches by some snake-oil salesmen.By using questionnaires designed specifically for each of the four different sectors of the concrete repair industry, a survey was done with regards to the state of training in South Africa in this specialized field. The results indicate that, although there is agreement that polymer-modified concrete patch repair is a highly specialized field; there is an unacceptably low level of training in each of these sectors with regards to the correct selection, application and care of such repair materials. Incorrect specification, inappropriate material selection, misunderstanding of the material properties and inadequate quality control are outcomes of this lack of knowledge and understanding which subsequently may lead to premature failures and/or under-performance of the repair. In addition, the survey results also indicate that the workforce performing the physical repair work, is mainly unskilled and some serious intervention is required to correct this situation.

scholarly journals JARINGAN KERJA DAN EFEKTIVITAS PERBAIKAN KAPAL DI GALANGAN KPNDP DKI JAKARTA, MUARA ANGKE (Network and Effectiveness of Ship Repair at KPNDP Shipyard DKI Jakarta, Muara Angke)

2016 ◽  
Vol 5 (1) ◽  
pp. 79
Author(s):  
Izza M. Apriliani ◽  
Sugeng H. Wisudo ◽  
Budhi H. Iskandar ◽  
Yopi Novita
Keyword(s):  
Lead Time ◽  
Critical Path ◽  
Recovery Process ◽  
Repair Process ◽  
Productivity Index ◽  
Critical Path Method ◽  
Eligibility Requirements ◽  
Supporting Element ◽  
A Minor ◽  
Ship Repair

<p>ABSTRACT<br />A shipyard is a supporting element to meet the eligibility requirements through maintenance service for vessels and their engines. Lead time for ship repair may vary, depending on the condition of ship. The length of the ship repair process can lead to shipyard queuing. One attempt to improve the mechanism and ship repairing time is by analyzing the network. This study aims to identify the network diagram, to determine the critical path, and to find out the effectiveness of ship repair process. Activities and duration during ship repairing process were analyzed using critical path method (CPM) and measured the value of its effectiveness. The objects that were observed in this study are minor repairs and major repairs. The results showed that a minor repairs can be implemented in 7 days while based on productivity index it can be completed in 5 days and has a 98% effectiveness than the time alocated by the shipyard. Major repairs can be completed during 10 days; these repairing lead time were affected by damage to the machine which requires a long recovery process.</p><p><br />Key words: CPM, effectiveness of ship repair, network analysis</p><p>-------</p><p><br />ABSTRAK</p><p>Galangan kapal merupakan unsur penunjang untuk memenuhi kebutuhan kelaikan kapal melalui perawatan beserta mesinnya. Proses perbaikan kapal dapat bervariasi tergantung dengan kondisi kapal. Lamanya proses perbaikan kapal dapat mengakibatkan terjadinya antrian galangan. Upaya untuk meminimalisir antrian kapal salah satunya dengan menganalisis jaringan kerjanya. Penelitian ini bertujuan untuk mengidentifikasi struktur jaringan kerja, menentukan jalur kritis serta mengetahui efektifitas proses perbaikan kapal. Proses dan waktu perbaikan kapal dianalisis menggunakan metode jalur kritis (Critical Path Method) kemudian dihitung nilai efektivitasnya. Hal yang diamati dalam penelitian ini yaitu perbaikan ringan dan perbaikan berat. Hasil penelitian menunjukkan bahwa penyelesaian perbaikan ringan di galangan KPNDP membutuhkan waktu selama 7 hari sedangkan berdasarkan index produktivitasnya dapat diselesaikan selama 5 hari dan memiliki efektivitas 98% dibandingkan waktu yang dialokasikan oleh galangan. Perbaikan berat dapat diselesaikan selama 10 hari, lamanya perbaikan ini dipengaruhi dengan kerusakan mesin yang membutuhkan proses perbaikan yang lama.</p><p><br />Kata kunci: CPM, efektivitas perbaikan kapal, analisis jaringan kerja</p>

Predicting Ship Maintenance and Repair Labor with Artificial Neural Networks

2021 ◽  
pp. 1-10
Author(s):  
Pierre-Andre M. Fruytier ◽  
Arun Kr Arun Kr Dev
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Predictive Analytics ◽  
Machine Learning Algorithms ◽  
Data Set ◽  
Repair Work ◽  
Maintenance And Repair ◽  
Independent Variables ◽  
Ship Maintenance ◽  
Artificial Neural

Ship maintenance and repair work cost estimation is often regarded as an “Art,” which may contribute to the financial success or distress of a shipyard. Regarded as experts by senior management, estimators are among the most valued resources, and nonetheless, human. Over time, estimators learn from mistakes, and get better with tenure at sharpening assessments. When estimators retire without having groomed an apprentice, shipyards may be at risk of losing a lot of know-how, all at once. These shipyards may well find very costly to experience, for a while, estimating skills stepping back on the learning curve. Yet, even shipyards relying on less advanced information technology may have unwittingly accumulated a lot of valuable data relevant to ship maintenance and repair works. These shipyards may overlook how easily accessible knowledge can be turned into a competitive advantage through predictive analytics. Not only can this data be literally mined, but machine learning algorithms, such as Artificial Neural Networks (ANN), can now process it for a speedy and preliminary estimate through faster and cheaper computing power. To be clear, the purpose is not to replace the human estimator but to help the expert quickly assess, when times are busy, whether to bid or not on a specific project opportunity. In the absence of The Master Estimator, an Apprentice may also look for a quick and cheap sanity check of the prepared estimate before submitting a bid. The study carried out in this article is based on all ship maintenance and repair data recorded at a single North American shipyard over the last 19 years since the current information systems were implemented. This raw data extract with all directly paid hours logged daily by workers on 1277 ship maintenance and repair projects was screened through advanced data cleansing. To enrich the cleansed data tables, additional independent variables were subsequently collected internally and externally to develop a training–testing data set. The final 657 projects represent 136 vessels regrouped in eight types, for which 28 other independent variables were all made available for training up to testing simple ANN models. The scope of this article is limited to the estimation of the direct labor required to complete ship maintenance and repair projects on a specific type of vessels for which workforce planning and tactical pricing was deemed the most relevant to keep the business afloat.

Application of STEP Technology to Ship Repair Data Management

2007 ◽  
Vol 23 (04) ◽  
pp. 231-237
Author(s):  
Manuel Ventura ◽  
C. Guedes Soares
Keyword(s):  
Data Management ◽  
Business Process ◽  
Data Exchange ◽  
Object Oriented ◽  
Repair Process ◽  
Data Management System ◽  
Ship Owner ◽  
Software Platforms ◽  
Ship Repair ◽  
Object Oriented Database

This paper describes some aspects of the application of STEP technology to the development of a data management system for a ship repair yard. The business process associated with ship repair activities implies a lot of data exchange between several companies, with different core businesses and organizations, using different software platforms and systems. In this activity, where the duration of the typical work is relatively small and the schedules are tight, the improvement of the communications between the actors involved is relevant. The system described here manages the information exchanged between ship owner and shipyard during the repair process, covering tendering, contract, production, and invoice phases. STEP technology was used not only for data exchange but also for the development of the persistent storage of data on an object-oriented database, driven by a formal EXPRESS-based schema.

Sign in / Sign up

Export Citation Format

Share Document