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Article
Publication date: 8 September 2021

Francesca Loia, Nunzia Capobianco and Roberto Vona

This study aims to investigate the collective perception regarding the future of offshore platforms and frame the main categories of meanings associated by the community with the…

Abstract

Purpose

This study aims to investigate the collective perception regarding the future of offshore platforms and frame the main categories of meanings associated by the community with the investigated phenomenon.

Design/methodology/approach

A data driven approach has been conducted. The collection of the peoples’ opinions has been realized on two specific social network communities as follows: Twitter and Instagram. The text mining processes carried out a sentiment and a cluster analysis.

Findings

The sentiment analysis of the most frequent words has been shown. The following four main homogeneous categories of words are emerged in relation to the decommissioning of offshore platforms: technological areas, green governance (GG), circular economy and socio-economic sphere.

Research limitations/implications

The alternative use of the offshore platforms, including tourism initiatives, aquaculture, alternative energy generation, hydrogen storage and environmental research, could improve the resilience of communities by offering the development of new jobs and the growth of local and innovative green businesses.

Practical implications

The adoption of a circular model and GG initiatives aims to limit the input of resources and energy, minimize waste and losses, adopt a sustainable approach and realize new social and territorial value.

Originality/value

The analysis underlines the importance to adopt a systems perspective, which takes into account the social, economic and environmental system as a whole, the different phenomena that occur and the variety of categories of stakeholders, from users to local governments that participate in the territorial development.

Details

Transforming Government: People, Process and Policy, vol. 16 no. 2
Type: Research Article
ISSN: 1750-6166

Keywords

Article
Publication date: 1 January 2024

Masoud Parsi, Vahid Baradaran and Amir Hossein Hosseinian

The purpose of this study is to develop an integrated model for the stochastic multiproject scheduling and material ordering problems, where some of the prominent features of…

Abstract

Purpose

The purpose of this study is to develop an integrated model for the stochastic multiproject scheduling and material ordering problems, where some of the prominent features of offshore projects and their environmental-degrading effects have been embraced as well. The durations of activities are uncertain in this model. The developed formulation is tri-objective that seeks to minimize the expected time, total cost and CO2 emission of all projects.

Design/methodology/approach

A new version of the multiobjective multiagent optimization (MOMAO) algorithm has been proposed to solve the amalgamated model. To empower the MOMAO, various procedures of this algorithm have been modified based on the multiattribute utility theory (MAUT) technique. Along with the MOMAO, this study has employed four other meta-heuristic methodologies to solve the model as well.

Findings

The outputs of the MOMAO have been put to test against four other optimizers in terms of convergence, diversity, uniformity and computation times. The results of the Mean Ideal Distance (MID) metric have revealed that the MOMAO has strongly prevailed its rival optimizers. In terms of diversity of the acquired solutions, the MOMAO has ranked the first among all employed optimizers since this algorithm has offered the best solutions in 56.66 and 63.33% of the test problems regarding the diversification metric and hyper-volume metrics. Regarding the uniformity of results, which is measured through the spacing metric (SP), the MOMAO has presented the best SP values in more than 96% of the test problems. The MOMAO has needed more computation times in comparison to its rivals.

Practical implications

A real case study comprising two concurrent offshore projects has been offered. The proposed formulation and the MOMAO have been implemented for this case study, and their effectiveness has been appraised.

Originality/value

Very few studies have focused on presenting an integrated formulation for the stochastic multiproject scheduling and material ordering problems. The model embraces some of the characteristics of the offshore projects which have not been adequately studied in the literature. Limited capacities of the offshore platforms and cargo vessels have been embedded in the proposed model. The offshore platforms have spatial limitations in storing the required materials. The vessels are also capacitated and they also have limited shipment capacities. Some of the required materials need to be transported from the base to the offshore platform via a fleet of cargo vessels. The workforces and equipment can become idle on the offshore platform due to material shortage. Various offshore-related costs have been integrated as a minimization objective function in the model. The cargo vessels release CO2 detrimental emissions to the environment which are sought to be minimized in the developed formulation. To the best of the authors' knowledge, the MOMAO has not been sufficiently employed as a solution methodology for the stochastic multiproject scheduling and material ordering problems.

Details

Engineering, Construction and Architectural Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-9988

Keywords

Expert briefing
Publication date: 4 November 2019

Offshore wind costs and potential.

Details

DOI: 10.1108/OXAN-DB247412

ISSN: 2633-304X

Keywords

Geographic
Topical
Article
Publication date: 1 January 1985

Pál G. Bergan, Egil Mollestad and Nils Sandsmark

A method for non‐linear static and dynamic analysis of flexible systems submerged in water is outlined. The systems considered here include cable and beam elements, as well as…

Abstract

A method for non‐linear static and dynamic analysis of flexible systems submerged in water is outlined. The systems considered here include cable and beam elements, as well as buoys and clump weights. Contact and lift‐off between members and the sea floor is also accounted for. The formulation used allows for very large deformations and material non‐linearities. Hydrostatic buoyancy and hydrodynamic drag forces are considered throughout the analyses. These capabilities have been implemented in the general purpose non‐linear finite element program FENRIS. Aspects concerning efficient solution of the non‐linear static and dynamic equations are discussed. In particular, an efficient start‐up procedure for analysis of highly flexible systems is described. The paper shows applications involving static and dynamic analysis of a floating structure kept in place by six mooring lines and a flexible riser system.

Details

Engineering Computations, vol. 2 no. 1
Type: Research Article
ISSN: 0264-4401

Article
Publication date: 13 August 2018

Isaac Animah, Mahmood Shafiee, Nigel Simms, John Ahmet Erkoyuncu and Jhareswar Maiti

A substantial number of production assets in the offshore oil and gas industry are facing operation beyond their anticipated design life, thus necessitating a service life…

Abstract

Purpose

A substantial number of production assets in the offshore oil and gas industry are facing operation beyond their anticipated design life, thus necessitating a service life extension program in the future. Selection of the most suitable strategy among a wide range of potential options to extend the lifetime of equipment (e.g. re-using, reconditioning, remanufacturing, refurbishing and adding on safety/process control measures) remains a challenging task that involves several technical, economic and organizational complexities. In order to tackle this challenge, it is crucial to develop analytical tools and methods capable of evaluating and prioritizing end-of-life strategies with respect to their associated costs and quantifiable benefits. The paper aims to discuss these issues.

Design/methodology/approach

This paper presents a life-cycle cost-benefit analysis approach to identify the most suitable life extension strategy for ageing offshore assets by taking into account all the capital, installation, operational, maintenance and risk expenditures during the extended phase of operation. The potential of the proposed methodology is demonstrated through a case study involving a three-phase separator vessel which was constructed in the mid-1970s.

Findings

The results from the application case indicate that the capital expenditure (CapEx) accounts for the largest portion of life cycle cost for the replacement strategy, while risk expenditure (RiskEx) is the major contributor to costs associated with life extension. A sensitivity analysis is also conducted to identify factors having the greatest impact on the optimum life extension solution, including oil price, production rate and money interest rate.

Practical implications

In the past, the decisions about life extension or replacement of in-service equipment were often made in a qualitative way based on experience and judgment of engineers and inspectors. This study presents a “quantitative” framework to evaluate and compare the costs, benefits and risks associated with life extension strategies and subsequently to select the best strategy based on benefit/cost ratios.

Originality/value

To the best of authors’ knowledge, no studies before have applied life cycle assessment and cost-benefit analysis methods to prioritize the potential life extension strategies in the oil and gas industry sector. The proposed approach not only assists decision makers in selecting the most suitable life extension strategy but also helps duty holders reduce the costs corresponding to life extension execution.

Details

Journal of Quality in Maintenance Engineering, vol. 24 no. 3
Type: Research Article
ISSN: 1355-2511

Keywords

Article
Publication date: 11 June 2020

Per Engelseth, Jan-Åke Törnroos and Yufeng Zhang

The purpose of this research is to detect, through applying a process-based view, how to manage economisation of the maintenance and modification operations in offshore petroleum…

Abstract

Purpose

The purpose of this research is to detect, through applying a process-based view, how to manage economisation of the maintenance and modification operations in offshore petroleum logistics operations.

Design/methodology/approach

A single case study of engineering services, more specifically, maintenance and modification service operations, on a Norwegian Sea oil platform reveals the dynamics of building network capabilities in a consistent network structure. Two layers of coordination are studied: the engineering process and its context, represented by its network of interconnected firms. This case study empirically grounds how engineering service involves managing reciprocally interdependent exchange processes in the network structure.

Findings

Pooled interdependencies are vital in understanding the nature of service provision and use, and sequential interdependencies are vital in narrating the timing of processes to reveal the nature of process emergence to coordinate strings of production events. Furthermore, the network structure, when characterised by multiple interdependent projects, is also dynamic but at a slower pace.

Originality/value

Through the case study, operations management is revealed to be associated with project emergence at two levels: the core process level regarding daily continuous change, including the changing interaction of multiple different and interdependent projects, and the contextual level, where features of interdependency and integration change, affecting engineering service production. This provides guidance as to the economisation of engineering services. They change not only interactions in the flow of production but also its context.

Details

Journal of Manufacturing Technology Management, vol. 32 no. 6
Type: Research Article
ISSN: 1741-038X

Keywords

Book part
Publication date: 1 July 2013

Inger G. Stensaker

This chapter presents trailing research (TR) as an approach for studying organization change in real time. I argue that TR can contribute in bridging the practitioner-scholar…

Abstract

This chapter presents trailing research (TR) as an approach for studying organization change in real time. I argue that TR can contribute in bridging the practitioner-scholar divide as well as generating methodologically rigorous, theoretically strong, and practically relevant research. I contrast the method with more traditional ways of researching change, such as positivistic research and action research and discuss various phases of the research process by drawing on my own experience with TR. While the objectives of the research are more similar to action research, the role of the researcher differs from both action research and positivistic research.

Details

Research in Organizational Change and Development
Type: Book
ISBN: 978-1-78190-891-4

Article
Publication date: 1 December 2001

How Sing Sii, Jin Wang and Tom Ruxton

Following a brief review of the current status of offshore safety regulations in the UK, several issues pertaining to the problems encountered in applying the existing reliability…

2028

Abstract

Following a brief review of the current status of offshore safety regulations in the UK, several issues pertaining to the problems encountered in applying the existing reliability and safety analysis methods in quantitative safety appraisal studies, especially in the early concept design stage of maritime engineering products, are discussed. Presents three novel risk assessment and decision support frameworks. These include a design trade‐off approach using Taguchi method, a safety based decision support system based on artificial neural network techniques, and a fuzzy‐logic‐based synthesis incorporating the Dempster‐Shafer approach for making multiple attribute decision. Three illustrative examples are used to demonstrate the novel tools, together with the discussion on the conditions under which each approach may be applied effectively. Finally, recommendations on further development in safety modelling, decision‐making techniques and their integration into safety management systems, are suggested.

Details

International Journal of Quality & Reliability Management, vol. 18 no. 9
Type: Research Article
ISSN: 0265-671X

Keywords

Content available
Article
Publication date: 1 March 2009

David Desplaces and Nancy K. McIntyre

This case engages students on a number of issues common to doing business in other countries, specifically in the Middle East. It is intended to be a basis for class discussion…

942

Abstract

This case engages students on a number of issues common to doing business in other countries, specifically in the Middle East. It is intended to be a basis for class discussion rather than to illustrate either effective or ineffective handling of the situation. The case seeks to integrate issues of international management and cross-cultural conflict and negotiation. Students are challenged to diagnose a cross-culturally sensitive situation and develop solutions in a team environment under limiting time restraints. This case is also designed to help students understand the cultural aspects of a situation and how different solutions could have major consequences on the bottom line of a company.

Details

New England Journal of Entrepreneurship, vol. 12 no. 1
Type: Research Article
ISSN: 2574-8904

Abstract

Details

Shipping Company Strategies
Type: Book
ISBN: 978-0-08-045806-9

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