scholarly journals Study of relationship between time overrunand productivity on construction sites

2011 ◽  
Vol 1 (1) ◽  
pp. 56-67 ◽  
Author(s):  
Oko Ameh ◽  
◽  
Emeka Osegbo ◽  
Keyword(s):  
Labour Productivity ◽  
Construction Materials ◽  
Negative Relationship ◽  
Project Managers ◽  
Construction Sites ◽  
Cost Overruns ◽  
Construction Firms ◽  
Construction Methods ◽  
History Of ◽  
Management Staff

The history of the construction industry worldwide is full of projects that were completed with significant time and cost overruns. In an attempt to reverse this trend, this study aims at establishing the relationship between time overrun and labour productivity on construction sites in Lagos, Nigeria. 43 technical and management staff of some medium and large construction firms based in Lagos, Nigeria were sampled and administered a questionnaire survey. The questionnaire contained 18 causes of project time overrun and 14 causes of low labour productivity which had been identified from the literature reviewed. With these a relationship between project time overrun and low labour productivity was established. Both descriptive and inferential statistics were used in analyzing the data. Results indicate that inadequate funds for the project, inadequate planning before project takeoff, inadequate tools and equipment and delay in delivery of material top the list of major causes of time overrun while the use of wrong construction methods, inadequate construction materials and inaccurate drawing/specification are the key factors causing low labour productivity on construction sites. Significant negative relationship was found between time overrun and labour productivity in construction sites in Nigeria. The study concludes by recommending that early appointment of project managers could ensure proper management of both the human and material resources that could guarantee improved productivity and ultimately save projects from time overrun.

Strategies for Engendering Health and Safety Culture in Construction Firms in Abuja, Nigeria

2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Jimoh R.A. ◽  
◽  
Oyewobi L.O. ◽  
Uthman N.L. ◽  
Ibrahim K. ◽  
...  
Keyword(s):  
Construction Industry ◽  
Safety Culture ◽  
Health And Safety ◽  
Project Managers ◽  
Construction Sites ◽  
Construction Firms ◽  
Varied Degree ◽  
Level Of Motivation ◽  
Construction Works ◽  
Civil Engineers

Many countries have put in place policies and legislation to reduce accidents and diseases on construction sites though having varied degree of comprehensiveness, the extent of implementation, will and capacity of enforcement. In spite of these efforts, it has been revealed that the increase in the rate of unsafe acts and rate of fatalities in the construction industry is significant due to poor safety culture. Hence, this study assessed the level of health and safety (H&S) culture in construction firms in Abuja by self-administering a total of 152 questionnaires on H&S issues to construction professionals. It included Builders, Quantity Surveyors, Architects, Civil Engineers, and Project Managers/supervisors who were involved in construction works. The data obtained were analysed using percentages and mean scores. It was discovered that despite the increasing growth in the construction firms in Nigeria, the H&S culture practice in construction firms is highly fragmented and poorly implemented. It is recommended among others that there should be high commitment from the top of organisations which will in turn produce higher level of motivation and commitment throughout the organisations.

Contractors’ Perspective on the Main Factors Influencing On-Site Labour Productivity: A Focus on Malaysian Infrastructure Projects

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohd Hanizun Hanafi ◽  
◽  
Ong Ming Zhen ◽  
Arman Abdul Razak ◽  
◽  
...  
Keyword(s):  
Construction Projects ◽  
Labour Productivity ◽  
National Development ◽  
Infrastructure Projects ◽  
Construction Sites ◽  
Construction Firms ◽  
Development Agenda ◽  
Importance Index ◽  
Financial Investments ◽  
Main Factors

The overall performance of construction projects has been seemingly low and has negatively affected its efficacy in fulfilling national development agenda. Infrastructure projects are complex and riddled with numerous construction risks, and often involve large financial investments as well as several resources, particularly labour. The objective of this research paper is to identify the main factors that influence labour on construction sites of infrastructure projects. In achieving this research objective, 26 factors were extracted from literature and subsequently distributed for assessment by 355 identified respondents via a questionnaire-based survey. 63 respondents, representing a response rate of 17.75%, participated in returning completed questionnaires for further analysis. The main factors that influence on–site labour productivity were identified through the use of Relative Importance Index analysis. The three most significant factors identified were co-ordination between sub-contractors, labour skill and expertise within specific job scopes, and, availability of updated construction drawings at the project sites. Several other factors were also extracted through the analysis conducted on the garnered data. These factors will collectively be able to accord contractors a better comprehension of the influencing elements that either impinge or promote labour productivity. These findings are pertinent for construction firms in the efforts to progressively increase the level of labour productivity in the Malaysian construction sector, particularly within the parameters of infrastructure projects.

scholarly journals FACTORS AFFECTING THE PRODUCTIVITY OF BUILDING CRAFTSMEN ‐ STUDIES OF UGANDA

2007 ◽  
Vol 13 (3) ◽  
pp. 169-176 ◽  
Author(s):  
Henry Mwanaki Alinaitwe ◽  
Jackson A. Mwakali ◽  
Bengt Hansson
Keyword(s):  
Construction Projects ◽  
Labour Productivity ◽  
Weather Conditions ◽  
Project Managers ◽  
Time Cost ◽  
Factors Affecting ◽  
Construction Methods ◽  
Importance Index ◽  
Building Craftsmen ◽  
Major Factors

Poor productivity of construction workers is one of the causes of cost and time overruns in construction projects. The productivity of labour is particularly important especially in developing countries, where most of the building construction work is still on manual basis. This paper reports on a survey made on project managers of building projects in Uganda, where an increase in productivity is being sought. Respondents were required to rate using their experience how 36 factors affect productivity with respect to time, cost and quality. The survey was carried out by a questionnaire and responses received over a period of 3 months. The ten most significant problems affecting labour productivity were identified as incompetent supervisors; lack of skills from the workers; rework; lack of tools/equipment; poor construction methods; poor communication; inaccurate drawings; stoppages because of work being rejected by consultants; political insecurity; tools/equipment breakdown; and harsh weather conditions. Although lack of materials is ranked highest with regard to average rating on loss of time, it was not ranked among the top ten using the importance index that takes into account time, cost as well as work quality. The policy makers and researchers should focus on the identified major factors in order to improve productivity.

scholarly journals An evaluation of the critical factors influencing productivity of masonry work in construction sites in Kano, Nigeria

2021 ◽  
Vol 12 (2) ◽  
pp. 40-48
Author(s):  
J.D. Jibril ◽  
M.A. Mukarram
Keyword(s):  
Early Stage ◽  
Labour Productivity ◽  
Project Managers ◽  
Critical Factors ◽  
Construction Sites ◽  
High Effect ◽  
Physical Abilities ◽  
Worker Experience ◽  
Very High ◽  
Structured Questionnaire

Construction labour productivity is of great interest to practitioners and researchers because it affects the performance and success of the project. This research assesses and ranks factors that critically influenced productivity of masonry work for some selected within Kano metropolis, Nigeria. A total of sixty three (63) respondents which include construction experts from lower to top management levels of various positions were selected. Structured questionnaire related to masonry labour and productivity was distributed to the selected respondents. The four most critical factors that negatively influence labour productivity of masonry as identified by the respondents work were found to be delayed in payment process. Payment process discourages some qualified contractors from bidding for the job, material quantity which result in stoppage of material delivery, security of life and property. Security as a constraint has negative and significant influence on the program of projects and worker experience. Lack of labourexperience has a very high effect on productivity; experience improves both intellectual and physical abilities that improve productivity.The inferences drawn from this study could be used by the project managers to take account of these factors at an early stage in order to improve labour productivity of workers on construction site in Nigerian.

Inverse Relationship Between Serum Bilirubin and Atherosclerosis in Men: A Meta-Analysis of Published Studies

2003 ◽  
Vol 228 (5) ◽  
pp. 568-571 ◽  
Author(s):  
Ladislav Novotný ◽  
Libor Vítek
Keyword(s):  
Inverse Relationship ◽  
Serum Bilirubin ◽  
Linear Trend ◽  
Meta Analysis ◽  
Negative Relationship ◽  
Epidemiological Studies ◽  
Atherosclerotic Disease ◽  
Categorical Variables ◽  
History Of ◽  
Stratified Analysis

Bilirubin, a major intravascular product of heme catabolism, is a potent antioxidant compound. Numerous studies have been published showing the relationship between serum bilirubin levels and atherosclerosis. In the present investigation all the epidemiological studies available on the effect of serum bilirubin levels and atherosclerotic disease were analyzed. Studies on the epidemiology of atherosclerotic diseases in relation to serum bilirubin levels were searched in the MEDLINE database. Selected studies were subdivided according to serum bilirubin levels and severity of atherosclerotic disease. Because of the limited number of females involved in the studies, only males were included into meta-analysis. Associations for ordered categorical variables (bilirubin and natural history of graded atherosclerosis) were assessed to find correlation and linear trend between analyzed variables. A stratified analysis was conducted to compare risks of clinical outcomes. Eleven relevant studies were used for analysis. A close negative relationship was found between serum bilirubin levels and severity of atherosclerosis (Spearman rank coefficient r = −0.31, P < 0.0001). The linear trend was confirmed in analysis of proportions with x2 values for both disease conditions to be very significant ( P < 0.0001). Unambiguous inverse relationship between serum bilirubin levels and atherosclerosis was demonstrated in this preliminary meta-analytic study. These results indicate the importance of hem oxygenase-related products in the prevention of oxidative stress-mediated diseases.

scholarly journals ECCLESIASTIC TYPIKON FROM THE SCIENTIFIC LIBRARY OF KYIV UNIVERSITY: ATTRIBUTION OF MANUSCRIPT

2018 ◽  
pp. 24-29
Author(s):  
S. Voloshchenko
Keyword(s):  
Key Words ◽  
Construction Materials ◽  
The State ◽  
Slavonic Language ◽  
National University ◽  
History Of ◽  
Rare Books ◽  
And Migration

The principles of scientific attribution of liturgical cyrillic manuscripts, which has been worked out by author, are examined. The thorough study of Jerusalem Ecclesiastic Typikon from the rare books and manuscripts department’s collection of Maksymovych Scientific Library of Taras Shevchenko National University of Kyiv is conducted. The stages of manuscript attribution are analyzed, including the date identification and localization of its origins and use. The type and the title of the codex have been identificated by the analysis of book’s texts. The linguistic variant of Church Slavonic language, used for re-writing the copy, is revealed, which has helped to localize the place of creation. Detailed watermark analysis of paper, which the copy had been made of, has allowed to estimate date range of its production. The problematic ascertainment of the date of creation has been also supported by the analysis of the textual sources, studying of palaeographic peculiarities of cyrillic script book, the inner book’s decorative features. The problem of binding production date, its construction, materials and design, is formulated. The state of preservation of manuscript is analysed, which led the author to understanding the extent of book’s relevance for its readers. The history of manuscript restoration and its stages have been studied. The places of use and migration of the copy are revealed on the basis of provenance examination up till its arrival to Maksymovych Scientific Library’s rare books collection. Key words: Jerusalem Ecclesiastic Typikon, manuscript, Cyrillic manuscript, attribution, codicology, Maksymovych Scientific Library of Taras Shevchenko National University of Kyiv.

scholarly journals A BESPOKE APPROACH FOR RELATING MATERIAL WASTE TO COST OVERRUN IN THE CONSTRUCTION INDUSTRY

2017 ◽  
Vol 1 (1) ◽  
pp. 39-52
Author(s):  
Ibrahim Saidu ◽  
W Shakantu ◽  
A Adamu ◽  
I Anugwo
Keyword(s):  
Construction Industry ◽  
Construction Material ◽  
Methodological Approach ◽  
Construction Project ◽  
Project Managers ◽  
Cost Overrun ◽  
Project Cost ◽  
Cost Overruns ◽  
Project Completion ◽  
Final Project

The problems of material waste and cost overruns are common in the construction industry. These problems occur at different stages of a construction project, from planning, design to project completion. The argument on how to eliminate cost overrun has been on-going for the past 70 years as on-site wastage of materials leads to increase in the final project cost. This paper examines the relationship between the causes of material waste and those of cost overrun at the pre-contract and post-contract stages of a project. The desktop methodological approach was firstly adopted in comparing the causes of material waste and those of cost overruns from the literature, in order to determine the possible relationship. Subsequently, interviews were purposively conducted with construction professionals within Abuja, Nigeria, in order to verify the literature based information. The result reveals that all the causes of material waste also cause cost overrun at the pre-contract and the post-contract stages of a project. 96.88% and 81.81% of the causes of cost overrun also cause material waste at the pre-contract and post-contract stages respectively. Other causes which are not related are mostly, the micro-economic and macro-economic factors. These results are not different from those of the interviews conducted with professionals and summarised in the tick box. It was also found that to achieve Effective Construction Material Waste Management (ECMWM) for any construction project, material waste must be controlled at its sources and causes, and at different stages of a project. Based on these findings, it can be concluded that effective management of material waste would translate into a reduction in the level of project cost overrun. The study recommends that construction-project managers, as well as the construction practitioners should encourage the management of material-waste causes, as it has the potential to minimise cost overrun for projects. 

The New Rural Residential Building Materials of Low Carbon Mode of Thinking

2012 ◽  
Vol 443-444 ◽  
pp. 110-114
Author(s):  
Yuan Luo
Keyword(s):  
Real Estate ◽  
Rural Areas ◽  
Building Materials ◽  
Construction Materials ◽  
Residential Building ◽  
Actual Situation ◽  
Low Carbon ◽  
New Model ◽  
Construction Methods ◽  
Current Transition

In the current transition conditions, living in rural areas how to form a new model to address the issue of live and living is very necessary. Mountainous rural areas and more for less, construction methods and how to inject carbon idea behind such issues as the actual situation in rural areas of the construction line tools and real estate construction materials, forming a certain significance of the ideas and methods.

Optimal Variability and Complexity

2013 ◽  
pp. 328-351 ◽  
Author(s):  
Joshua L Haworth ◽  
Srikant Vallabhajosula ◽  
George Tzetzis ◽  
Nicholas Stergiou
Keyword(s):  
Learning Strategies ◽  
Human Movement ◽  
System Optimization ◽  
Discovery Learning ◽  
Optimal Solutions ◽  
Systems Perspective ◽  
History Of ◽  
Self Discovery ◽  
Set Up ◽  
Management Staff

Management seeks to provoke system optimization throughout ever changing environmental and internal conditions. Typically, perturbations to stable organizations are unpredictable and difficult to define, except from within a chaos perspective. How should management staff set up their workforce to be best responsive to these changes? It is proposed that a dynamic systems theoretical approach to the organization of the management system would foster the ideal scenario. This approach lends well to the inclusion of discovery learning strategies that promote the valuable use of optimal variability in the exploration and self-discovery of optimal solutions to existent and novel problems. In this text, the authors walk the reader through a brief history of the development of the systems perspective on human movement optimization. Next, they extend the related discoveries to applications within management systems. It is hoped that a new appreciation for complexity and beneficial aspects of variability is conveyed.

Commute and labour productivity: investigation of inner city construction sites

2020 ◽  
Vol 18 (5) ◽  
pp. 1305-1319
Author(s):  
Daniel Alejandro Chaparro ◽  
Fei J. Ying ◽  
Funmilayo Ebun Rotimi ◽  
Temitope Egbelakin
Keyword(s):  
Negative Impact ◽  
Labour Productivity ◽  
Central Business District ◽  
Geographic Area ◽  
Key Factors ◽  
Construction Sites ◽  
Content Type ◽  
City Construction ◽  
Business District ◽  
The Impact

Purpose This paper aims to identify the impact that commute patterns pose on construction labour productivity (CLP). There is limited research focussed on the impact of workforce transportation on productivity, even fewer in a construction environment. In particular, this study seeks to fill a gap in the understanding of how commute patterns may influence CLP. Design/methodology/approach Key factors reported affecting CLP were identified through a comprehensive literature review. Data were collected from 27 interviews and observational evidence at construction sites on Auckland Central Business District (CBD). Findings Shortage of skills, communication among workers, shirking behaviour, absenteeism and tardiness were perceived as the most critical labour productivity factors that are influenced by commute patterns. It is considered that stressful commutes may lead to shirking behaviours (absenteeism and calling sick). Meanwhile, ridesharing may encourage communication among workers. Research limitations/implications The study was carried out in a central business district, focussing on a geographic area with its particular characteristics. The results, thus, may not be generalised in general urban settings. Originality/value The research outcomes can be used as guidelines for companies considering travel plans for their employees, to minimise the negative impact commuting can have on workers, especially in industries with low productivity.

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