Search results

Although several studies have been undertaken on sustainability within infrastructure projects, limited attention has paid to the drivers for, and the barriers to, the incorporation of sustainability in public–private partnership (PPP) infrastructure projects through empirical study, particularly in Nigeria. Therefore, this study aims to identify and examine the drivers that promote sustainability in Nigerian PPP infrastructure projects and assess the barriers to the full integration of sustainability practices into current Nigerian PPP infrastructure projects.

Primary data were collected using a questionnaire survey. The questionnaire survey was targeted on four different stakeholders’ organizations. They were public sector authorities, concessionaires, consultants and banks already undertaking PPP infrastructure projects in Lagos State, Nigeria. The obtained data were analyzed using frequency, percentage, mean score, standard deviation and the Kruskal–Wallis test.

The study identified 17 drivers that promote the incorporation of sustainability in PPP infrastructure projects. The analysis of the total ranking of the drivers in Nigeria revealed the top five ranked drivers to be: consideration of long-term performance; contractual arrangements; incentives for new market penetration; award criteria; and selection criteria, respectively. The study further identified 11 barriers to sustainability integration in PPP infrastructure projects and the top five ranked barriers in Nigeria are as follows: comprehensive sustainability procurement guidelines; no enabling environment; education needs; uncertain economic environment; and a lack of clear government policy, respectively. The results of the Kruskal–Wallis test conducted on both the 17 identified drivers for, and the 11 barriers to, the incorporation of sustainability in Nigerian PPP infrastructure projects revealed that there is no significant statistical difference in both rankings from the perceptions of the aforementioned four different respondents’ groups.

The study provides empirical insights on the knowledge and awareness of drivers which could lead to a greater uptake in sustainability measures by the stakeholders in Nigerian PPP projects; it also identified barriers to overcome.

The importance of the incorporation of sustainability in public procurement cannot be over-emphasized. It is anticipated that the study will be of great value to PPP stakeholders involved in sustainability decision-making processes when delivering sustainable PPP projects.

A better cooperation among all stakeholders working towards enhancing the disaster resilience of societies can only be achieved if the expectations or the needs of each stakeholder are understood. This study attempts to outline the needs of communities affected by disasters for the purpose of aligning the needs and skill requirements with the abilities of built environment professionals serving these communities. Therefore, the study aims to identify and describe community needs and skills requirements for enhancing disaster resilience.

The study adopted literature review and semi-structured interviews. The semi-structured interviews were conducted with key members of some communities affected by disasters and with some of the professionals who participated in the restoration/reconstruction of those communities. Data obtained were analysed using NVivo 10.

The study revealed the current and emerging needs and skills of communities related to the built environment professionals from the viewpoint of enhancing disaster resilience. Thus, 29 classifications of skill and needs were derived and classified under five major disaster resilience dimensions to include social, economic, technological, environmental and institutional aspects.

This study focuses only of the needs and skills of the “community”, which is the major stakeholder that is basically the receiver of all that the other stakeholders of disaster resilience have to offer.

This study would help the built environment professionals involved in disaster resilience to become aware of the specific needs and skills of the communities affected by disasters for the purpose of developing their competences.

The study findings would be useful for both the built environment professionals and higher education institutions. Because it is important for professionals to update and upgrade their knowledge towards enhancing their capabilities and meeting stakeholders’ expectations in a bid to enhance societal resilience to disasters across all domains of resilience.

The land is a critical resource for public-private partnerships (PPPs) in infrastructure development. However, acquisition of land for PPP infrastructure projects implementation increasingly becomes problematic in developing countries. Yet, effort at investigating the factors causing a delay in land acquisition for PPP infrastructure projects through an empirical method in developing countries received scant attention. Therefore, the purpose of this study is to identify and critically assess the factors predisposing PPP projects implementation to land acquisition delay in Nigeria using an empirical approach.

The study adopted literature review and questionnaire survey. For instance, literature review was used to identify the factors causing delay in land acquisition for PPP projects in developing countries, which was used to design the questionnaire survey culminating in data analysis. To capture a broad perception, the questionnaires were administered to three different primary stakeholder groups comprised public sector authorities (i.e. ministries, department, agencies), concessionaires and lenders/banks involved in PPP projects implementation in Nigeria. Data collected were analysed using mean score, Kruskal–Wallis test and factor analysis.

The study revealed the mean score ranking of 22 identified factors causing a delay in land acquisition for PPP projects in Nigeria. The result of factor analysis grouped the 22 identified factors into 4 principal factors, namely, resettlement issues with political interference; non-availability of land with a higher cost of land transactions; weak planning institutions; and rehabilitation issues with extensive legal delays.

These study findings have implications for both policymakers considering PPP projects and private investors seeking to finance a PPP project in developing countries. Also, the study findings would be useful for the governments in Nigeria and other developing countries to formulate clear policies framework that facilitates the smooth acquisition of land for PPP projects.

The study will be beneficial to the potential local and foreign private investors and governments by broadening their awareness on impediments in land acquisition for PPP projects in Nigeria and developing countries at large. These study findings are crucial, as not many empirical studies have been conducted in Nigeria and many other developing countries.

Public‐private partnerships (PPPs) are being faced by risk threats, notwithstanding the fact that the PPP model has been structured in a way that the associated risks are shared by both the public and private sectors. Consequently, the sources of risk change over the PPP project phases. Thus, the purpose of this paper is to identify and assess the risk factors in PPP infrastructure project phases comprising development phase, construction phase, operation phase and project life cycle through an empirical approach.

The study adopted four different data-gathering approaches including literature review, desk review, brainstorming session and questionnaire survey. In order to capture a broad perception of stakeholders, the questionnaires were administered to three different stakeholder organizations to include public sector authorities (i.e. ministries, department and agencies), concessionaires and lenders/banks involved in different PPP infrastructure projects implementation in Nigeria. A total of 81 questionnaires were administered, out of which 63 were retrieved but after checking through the completed questionnaires, 60 questionnaires were found suitable for the analysis. Data collected were analyzed using descriptive statistics, mean score, Kruskal–Wallis test and the risk significance index in terms of severity and likelihood of occurrence conducted.

In total, 70 risk factors were identified with respect to PPP project phases and their relative importance was gauged. In addition, the analysis of total 70 risk factors in the development phase, construction phase, operation phase and project life cycle phase indicated that 51 risk factors are located in the yellow zone, which is considered as moderate and 19 risk factors are located in the red zone that are regarded as critical.

The identification of specific critical risk factors in each PPP project phase will provide a benchmark in developing risk management programs in developing countries.

These study findings would be useful for PPP stakeholders to focus their attention, priorities and leadership in managing these critical risk factors. Furthermore, the findings of this study are significant in providing an in-depth understanding of the current Nigeria’s PPP market environment, which is a true reflection of developing countries as a whole.

In the global construction industry, the concept of sustainability is not new, particularly within building projects. Against this backdrop, several studies have been conducted, mostly in developed countries, on sustainability in construction projects. However, efforts at investigating sustainability practices in public–private partnership (PPP) infrastructure projects in developing countries have received limited attention. Hence, the purpose of this study is to investigate the incorporation of sustainability practices within the context of Nigeria’s PPP infrastructure projects.

A questionnaire survey, which targeted four different types of stakeholders, was conducted in this study. These stakeholders included public sector authorities, concessionaires, consultants and banks undertaking PPP infrastructure projects in the Lagos State, Nigeria. The data collected were analyzed using frequency, percentage, mean score, standard deviation (SD) analyses and the Kruskal–Wallis test.

The findings of this study revealed that all the respondents are very much aware of sustainability principles and the vast majority of the respondents from the public sector authorities and the consultant organizations confirmed that they have incorporated sustainability requirements into their bidding documents for PPP infrastructure projects. The study revealed sustainability features in the three aspects of sustainability, namely, economic, environmental and social factors. Furthermore, the study revealed the top three–ranked economic factors of sustainability (considered to be the most important factors) were low maintenance costs, whole life costing and supporting the local economy, respectively. Similarly, the study revealed the top three–ranked environmental factors of sustainability were biodiversity, energy use during the operation stage and energy use during the construction stage, respectively. Furthermore, the study further revealed that the top three–ranked social factors of sustainability were the educational aspect, equity between stakeholders and health and safety, respectively.

The study will be of great value to PPP stakeholders involved in sustainability decision-making processes when delivering sustainable PPP projects, particularly in Nigeria. Also, the study’s findings are important as not many empirical studies have been conducted on the sustainability practices of current PPP projects in Nigeria.

The study’s findings would further inform the need for both the public and private sectors to take a more strategic approach to enhance sustainability in PPP projects.

Building information modeling (BIM) is vital in the performance improvement of contracting firms. Thus, there is a need to stimulate its implementation in the construction sector with a view to meeting the competitive demands of the industry. However, there have been very few studies on BIM implementation among contracting firms in Nigeria. Hence, this study aims to examine the current BIM uptake among Nigerian contracting firms, assess the barriers to BIM implementation and examine the ways of improving BIM implementation within these contracting firms.

A questionnaire survey was conducted on contracting firms (comprising small-, medium- and large-sized firms) in Lagos, Nigeria. The obtained data were analyzed using both descriptive and inferential statistics. These included percentage, mean score, standard deviation, the Kruskal–Wallis test and factor analysis.

This study revealed the current state of BIM implementation among contracting firms in Nigeria in terms of their knowledge of BIM, their usage of BIM as well as the BIM software adopted. Furthermore, the study identified 25 barriers to BIM implementation in contracting firms and identified 15 ways to improve BIM implementation in contracting firms. The relative importance of both the identified barriers and the ways for improving BIM implementation was gauged among contracting firms comprising small-, medium- and large-sized firms. The result of the Kruskal–Wallis test revealed that, except for two (out of 25) identified barriers, and one (out of 15) identified ways of improving BIM implementation in contracting firms, there is no significant statistical difference in the perceptions of the three respondents’ groups. The result of the factor analysis categorized the identified 25 barriers into seven main factors.

This study provides empirical evidence on the barriers to BIM implementation and the ways of improving its implementation among contracting firms, thereby providing a better insight of the Nigerian construction industry’s BIM environment.

This study’s findings can positively inform the decisions of construction stakeholders to formulate strategies capable of improving BIM implementation in the construction industry at large.

BIM has much potential to improve the effectiveness of construction works with respect to design, construction and maintenance. However, many Architecture, Engineering, and Construction (AEC) firms are still lagging in the adoption and implementation of BIM in both developing and developed countries. The purpose of this study is to assess the barriers to BIM implementation, and examine the ways forward to improve BIM adoption within the Nigerian AEC firms.

A comprehensive literature review and questionnaire survey were used in the study. The survey targeted four different AEC firms. These include architectural firms, facility management firms, quantity surveying firms and structural engineering firms in Lagos, Nigeria. The data obtained were analyzed using mean score, standard deviation, Kruskal–Wallis test, and factor analysis.

The study identified 20 barriers to BIM implementation and identified ten ways forward to improve BIM adoption in AEC firms, particularly in Nigeria. The relative importance of both the identified barriers and the ways forward were gauged. The Kruskal–Wallis tests revealed that except for one (out of 20) identified barriers, and one (out of 10) identified ways forward; there is no statistical significant difference in the perceptions of four different AEC firms. The factor analysis result grouped the 20 identified barriers into three major factors to include: weak top management support and BIM environment related issues; cost of BIM software and training issues; and incompatibility, legal, contractual, and culture related issues.

The significance of the study cannot be over-emphasized due to BIM relevance to construction stakeholders and researchers at large.

The study findings would inform the decisions of the construction stakeholders to make some policy recommendations capable of positively influencing the full BIM implementation in AEC firms.

Although scientific research community has shown considerable interest in identifying critical success factors (CSFs) for public-private partnership (PPP) projects, yet effort at assessing and compare CSFs within similar PPP infrastructure projects received scant attention. The purpose of this paper is to identify, assess, and compare the CSFs in PPP transport infrastructure projects.

The study adopted literature review and three PPP case studies including structured interviews and review of documentary reports in each case study. The outcome of literature review provided a total list of 26 identified success factors, which was used to design a case study protocol using failure mode and effect analysis (FMEA) technique. FMEA was conducted on each 26 identified success factor to assess their criticality in the three PPP case studies.

The results of FMEA revealed a total of ten CSFs in the concession of the road; four CSFs in the concession of the airport; and eight CSFs in the concession of the seaport. Also, the cross-case analysis showed the three prevalent CSFs, this includes government involvement by providing guarantees, political support, and project economic viability.

The study findings including lessons learnt in each case study would positively influence policy development towards PPP transport infrastructure projects and the manner in which partners (i.e. public and private sector) go about the development of PPP transport projects.

This research would help PPP stakeholders to focus their attention and priorities in managing the identified CSFs in achieving long-term success in PPP transport infrastructure projects implementation.

The presence of previous awarded public-private partnership (PPP) infrastructure projects that significantly delays reaching financial close constrain the likely success of new PPP projects. However, effort at investigating financial close delays of PPP projects through empirical studies by the research community received scant attention. Thus, the purpose of this paper is to identify and assess the factors causing delays in PPP projects from reaching financial close in developing countries.

The study adopted literature review and questionnaire survey. In order to capture a broad perception, a questionnaire survey was adopted, which was administered to three different primary stakeholder categories comprised public sector authorities (i.e. ministries, department, and agencies), concessionaires, and lenders/banks already involved in PPP infrastructure projects implementation in Nigeria. The data obtained were analysed using mean score, Kruskal-Wallis test, and factor analysis.

The study revealed the mean score ranking of 39 identified causes of financial close delays in PPP projects, and the mean score values for all the identified 39 causes of financial close delays are very high. The study, through factor analysis, categorised the 39 identified causes of financial close delays into eight principal factors. The factors are: decreased bankability of PPP projects; unstable economic policy; weak financial, technical, and managerial capabilities of the concessionaires; weak public institutions; lack of creditworthiness of both the project sponsors and active partner; unfavourable economy of the host country; weak legal and unfavourable environment; and high contingent liabilities, respectively.

The identification and evaluation of the factors delaying PPP projects development from reaching financial close in a reasonable time manner would be useful for PPP primary stakeholders to develop strategies to safeguard the present and future PPP projects implementation in developing countries.

The study findings would be useful for both policymakers considering PPP projects and private investors seeking to finance PPP projects in developing countries. This study is crucial as not many empirical studies have been conducted in developing countries.

Although studies have shown the relevance of building information modeling (BIM) in cost estimating process, efforts at investigating BIM based detailed cost estimating among professional quantity surveyors through quantitative approach are scanty. The purpose of this study is to identify and examine the usage of BIM-based detailed cost estimating software and assesses the drivers to BIM adoption within the Nigerian quantity surveying consulting firms.

A comprehensive literature review, pilot study and questionnaire survey were adopted. The survey targeted both the BIM users and non- BIM users’ quantity surveying consulting firms in Lagos, Nigeria. The data collected were analyzed using frequency, percentage, mean score, standard deviation, Mann–Whitney test and factor analysis.

The study found that 46.58 per cent of quantity surveying consulting firms are aware of BIM and have adopted it for detailed cost estimating, while 49.32 per cent of quantity surveying consulting firms are aware but have not adopted BIM-based detailed cost estimating, and 4.10 per cent of quantity surveying consulting firms are not aware at all. Also, the study identified various BIM-based detailed cost estimating software used in quantity surveying practices and found that Microsoft Excel is often used alongside 3D software, Autodesk QTO, Navisworks, Innovaya Composer and CostX are prevalent BIM software used for detailed cost estimating. In addition, the study identified 21 drivers to the adoption of BIM in quantity surveying practices. The result of factor analysis grouped the 21 identified drivers into five principal factors: improved whole lifecycle/design quality, enhanced decision and visualization, cost and time saving, marketing and support for quantity surveyor tasks and government and client pressure.

This study provides significant insight into the application of BIM to quantity surveying consulting practices, thereby enabling consultant quantity surveyors to make informed decisions to select BIM cost estimating software to suit their practices. Further, the study findings can be useful for individuals’, clients’ and contractors’ quantity surveyors to be fully aware of the opportunities BIM could bring in relation to their service delivery.

Accurate cost estimating, effective cost monitoring and control are essential elements to a construction project success. This study further emphasized the importance of BIM to quantity surveying practices, particularly in the area of the detailed cost estimating.