Embracing off-site innovation in construction in China to enhance a sustainable built environment in urban housing

With the rapid rate of urbanization and pressing need for higher levels of sustainable development within the built environment in China, the housing construction industry presently is facing urgency of shaping a sustainable construction process. This paper examines several sustainability challenges from the large-scale urban housing construction, and explores the connection between off-site innovation and sustainability within a context of China's housing construction industry. The study also identifies four pillars of strategy agendas that could enhance an enabling innovation environment for the ultimate goal of sustainability: (1) institutional environment, (2) public housing market, (3) organisational actions and (4) technological capacity. The knowledge and research findings presented in this paper would provide a ground framework that helps evaluate and assess the significances of off-site innovation to assist with a sustainable built environment.

Validating the impact of EVM on project life cycle

With the inevitable increase in size and complexity of construction projects, the need for proper control is increasing. Considering the fact that each project strives for excellence, numerous studies have been conducted over the years to measure performance and investigate factors that are really critical towards project success. Earned Value Management is a project performance evaluation technique which enables industry professionals to closely monitor project performance in both time and cost .The aim of this paper is to examine the result of proper Earned Value Management (EVM) implementation on different project life cycle (PLC) and validate the impact on project success.

The study investigates different success factors in construction industry with special focus on previous researchers’ work which studied the importance of cost control in project success especially in fragmented industry like construction, followed up with three different case studies to analyze the positive impact of EVM implementation on construction projects. Furthermore, for data triangulation purpose, case study analysis will be supported by interviews with specialists working in the UAE construction industry to cross check the outcomes of previous researches.
The research shows that EVM application on cost control in construction projects is not only a crucial management task which is a key to the success of the business but also its influence on project success depends on the time of implementation. It requires a number of up-to-date input data consistently throughout the construction phase. Assigning the right budgets, calculating accurate estimates and monitoring actual costs throughout different project stages are the three main drivers of an effective control through PLC staring from inception stage till completion. EVM proved to be of vital importance due to alarming escalation of construction costs which needs to be especially monitored and controlled. Senior management support and availability of professional staff to execute cost control systems are key factors towards successful implementation

A panel vector error correction approach to forecasting demand in regional construction markets

Reliable forecasting as to the level of aggregate demand for construction is of vital importance to developers, builders and policymakers. Previous construction demand forecasting studies mainly focused on temporal estimating using national aggregate data. The construction market can be better represented by a group of interconnected regions or local markets rather than a national aggregate, and yet regional forecasting techniques have rarely been applied. Furthermore, limited research has applied regional variations in construction markets to construction demand modelling and forecasting. A new comprehensive method is used, a panel vector error correction approach, to forecast regional construction demand using Australia’s state-level data. The links between regional construction demand and general economic indicators are investigated by panel cointegration and causality analysis. The empirical results suggest that both long-run and causal links are found between regional construction demand and construction price, state income, population, unemployment rates and interest rates. The panel vector error correction model can provide reliable and robust forecasting with less than 10% of the mean absolute percentage error for a medium-term trend of regional construction demand and outperforms the conventional forecasting models (panel multiple regression and time series multiple regression model). The key macroeconomic factors of construction demand variations across regions in Australia are also presented. The findings and robust econometric techniques used are valuable to construction economists in examining future construction markets at a regional level.

An investigation into using off-site production in housing construction for the sustainable built environment in China.

Zhai Xiaolin undertook a study of off-site construction in China's housing construction industry during her past four years PhD study. Her research provides an original thinking of embracing offsite construction as a method to help China's construction industry towards a more sustainable built environment. Also her research findings provide possible implications for other developing countries that are also seeking to identify and overcome sustainable crisis in construction industry.

Enterprise localization practices and their implication for knowledge management in foreign participation in the Chinese construction sector

Foreign firms active in the Chinese construction industry find themselves in a competitive environment unlike the environments in which they operate back home. Adaptations are therefore required in order that firms retain competitive leverage while integrating into the circumstances of the Chinese market. Since these firms primarily compete on superior knowledge capabilities it is instructive to understand how adaptations both serve to transfer propriety capabilities to China while adapting to the knowledge characteristics of the Chinese market into which those capabilities are transplanted. Five localizing parameters across which adaptations take place are identified in this paper and rates of localization are tabulated for 60 foreign firms active in the Chinese construction industry. Revealed localizing behaviors are then analyzed in the light of existing literature for explanatory power. It is concluded that in order to be strategically competitive firms must not only retain knowledge differentials, but that the knowledge must be coded and disseminated in a manner suited to the environment in which it is to be utilized.

Use of antiseptic hand rubs in the health and community services industry: an Australian population-based survey

BACKGROUND: The use of antiseptic hand rubs (AHRs), rather than washing with soap and water, is considered to be the gold standard for reducing the frequency of nosocomial infections, as well as being less damaging to the hands than washing with soap and water, but little is known at a population level about usage patterns for AHRs. OBJECTIVES: To describe AHR use patterns among workers in the health and community services industry in Australia. METHODS: Using data from a population-based survey of Australian workers, we focused on health and community services workers' exposure to chemicals at work, including the use of AHRs. Data regarding the frequency of hand-washing were also collected. RESULTS: Nine hundred and fifty-six health and community service workers participated in the Australian National Hazard Exposure Worker Surveillance survey. Of these, 11% reported using AHRs, and 31% reported hand-washing >20 times per shift. According to an adjusted logistic regression model, professional workers [adjusted odds ratio (aOR) 2.29, 95% confidence interval (CI): 1.40-3.72] and frequent hand washers (aOR 3.08, 95%CI: 1.92-4.93) were more likely to use AHRs. CONCLUSIONS: AHR use by health and community service workers was generally lower than expected. AHR use was most likely to be reported by professionals and frequent hand washers, suggesting that AHRs are used as an adjunct to conventional hand-washing.

Critical barriers to BIM implementation in the AEC industry

Building Information Modelling (BIM) is one of the most significant technological advances in the building design and construction industry to date. Implementation of BIM has increased significantly over the past decade; and it enables the different stakeholders of a construction project to collaborate better throughout its lifecycle, and improves the opportunities to share data and decrease consumption. However, the implementation of BIM lags far behind its potential due to the existence of various barriers. This paper aims at identifying, classifying, and prioritising these barriers to BIM implementation through a survey. The research findings are expected to assist major stakeholders in the construction industry to promote BIM implementation.

Labour productivity in Iranian construction projects perceptions of chief executive officers

Purpose – The purpose of this paper is twofold. First, it aims to highlight the main factors and items affecting the productivity of construction projects, based on the perceptions of CEOs in construction companies in Iran. Second, the study compares the elicited CEOs’ perceptions against the findings of studies based on the views of such as project managers, middle managers and employees in other levels. Design/methodology/approach – The study drew upon literature on construction work to develop a conceptual model. Further, a total of 60 CEOs from road construction companies were surveyed using a five-point Likert scale questionnaire to generate the data. The collated data were categorised and ranked according to the CEOs perceived level of importance using the relative importance index. Findings – The findings highlight the main factors and items affecting labour productivity in construction projects in Iran as perceived by CEOs, which are mainly of human resources management nature and could be attributed to motivation and managerial policy aspects. The study also recognises that factors associated with the working environment particularly safety and health are perceived as insignificant by Iranian CEOs which could be a concern for the Iranian construction industry. The discussions shed some light on the discrepancies between the perceptions of CEOs and previous studies in regards to major determinants of productivity in the construction context. Originality/value – This study is the first study aiming at discussing the perceptions of CEOs of construction companies active in construction projects in Iran. As such, the study highlights the standpoint of the main decision makers in construction companies in regards to labour productivity in the construction sector. Thus, the key contribution of the present study is providing insight into the perceptions of CEOs, who play the most vital role in strategic development of construction companies whereas previous studies have mostly focused on project or middle managers having a lower influence in determining the strategic plans of companies.

Safety communication patterns in small work groups – a pilot study using social network analysis

As a project based industry, construction is portrayed through the short term and transitory nature of the industry. This is one of the factors that have been correlated to the poor safety performance of the construction industry. An essential part of safety performance, however, is the effective safety communication between all parties on construction projects. The construction industry is highly regulated due to its high incidence of work-place accidents. This is especially true of smaller building companies/enterprises where the burden of compliance to safety regulations is most onerous. The majority of current research in this topic area has focused on identifying the high risk components or the causes of increased risks. The literature on safety communication network patterns and its relation to safety performance is nevertheless minimal. Thus, this study takes the opportunity to explore the safety communication issue by analyzing the communications patterns in small workgroups. In a pilot study, through surveys with construction crews that are contributing to active construction projects in Sydney, Australia, patterns of safety communications were identified using social network analysis (SNA). The findings, though preliminary, has identified safety communication network patterns under formal communications and toolbox talks may determine a small group’s safety performance.

An investigation into health and safety risks associated with deconstruction

As a response to calls for making construction activities environmentally conscious, alternatives to mechanical demolition such as deconstruction, recycling and reuse for re-entering building materials and components back in to the supply chain have emerged. However, deconstruction has remained unexploited within the construction industry due to the adverse effects of barriers and challenges that make demolishing contractors shy away from implementing deconstruction in projects. On assessment of the barriers/challenges facing deconstruction it was revealed that deconstruction, like all construction activities, is fraught with various health and safety hazards. This study attempts to identify the role of health and safety risks in impeding the widespread implementation of deconstruction practices in construction projects. Afterwards, major health and safety risks associated with deconstruction activities are identified. Findings of the present study are based on the results acquired through conducting unstructured interviews with 6 demolition contractors in South Australia. The study contributes to the body of knowledge by further establishing the deconstruction field and providing a basis for future investigations into barriers of deconstruction. Further, presented discussions would provide professional implications by offering guidelines for managing deconstruction projects in a safer and more efficient environment.

Major factors affecting waste generation on construction sites in Iran

Construction and demolition (C&D) waste account for a large share of total solid waste sent to the environment. As a result, effective C&D waste management has been treated as one of the available avenues towards sustainable development. Yet, C&D waste management within the Iranian construction industry has been literally overlooked by investigators. As one of the first studies in Iran, the main causes of generating C&D waste on construction projects have been identified through a review of literature. Afterwards, the list has been subjected to the scrutiny of 101 experts in the field deploying a questionnaire survey. The findings revealed that important causes of C&D waste generation on construction sites were all associated with lack of skills and experience of construction workers and lack of awareness of the concept of waste and values of construction materials. No discrepancy in terms of causes of waste generation was observed among different tiers of construction companies in the Iranian construction industry. The paper concludes with providing a number of guidelines to address the issues as identified for Iran and other developing countries suffering from the same problems.

Measuring output structures of multinational construction industries using the World Input‒Output Database

In the context of international movement towards trade liberalization, increasing technological progress, open competition and social development have impacted deeply on the construction industry in all economies. Using the World Input–Output Database (WIOD), a multinational comparison of the construction industry is estimated from 1995 to 2011 to provide accurate and valid information on the changing patterns of its output structure. The output coefficients for 37 countries and regions are formulated to allow for inter-industry comparisons and to identify the major components of construction output. Changes of output structure are then elaborated over time across countries and regions. The research findings presented in this paper would provide a framework for identifying the output structure of a nation's construction industry and its change trends at an international level, which may help policymakers and enterprises with the formulation of their future development strategies.

Barriers to BIM adoption: Perceptions from Australian small and medium-sized enterprises (SMEs)

This study draws upon a questionnaire survey distributed amongst SMEs in Australia to offer an insight into the main barriers to BIM adoption within Australian SMEs. Based on analyses of 78 completed questionnaires from non-adopters, the main barriers making SMEs shy away from BIM adoption are discussed. The findings show that currently around 42% of Australian SMEs are engaged with BIM. It comes to light that lack of knowledge and resources within SMEs is not a major barrier for Australian SMEs. In essence, the main barriers stem from lack of interests of clients and subcontractors working for SMEs alongside the risks associated with an uncertain return on investment (ROI) for BIM as perceived by key players in SMEs. The study contributes to the field by providing an updated insight into the status quo of BIM in Australian SMEs and spots the main barriers to target for promoting BIM adoption across Australian SMEs.