Suchergebnisse

© 2020, Emerald Publishing Limited. Purpose: 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. Design/methodology/approach: 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. Findings: 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. Research limitations/implications: 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. Originality/value: 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.

Currently, heritage is challenged in the Indian city of Surat due to diverse pressures, including rapid urbanization, increasing housing demand, and socio-cultural and climate changes. Where rapid demographic growth of urban areas is happening, heritage is disappearing at an alarming rate. Despite some efforts from the local government, urban cultural heritage is being neglected and historic buildings keep being replaced by ordinary concrete buildings at a worryingly rapid pace. Discussions of challenges and issues of Surat's urban area is supported by a qualitative dataset, including in-depth semi-structured interviews and focus groups with local policy makers, planners, and heritage experts, triangulated by observation and a photo-survey of two historic areas. Findings from this study reveal a myriad of challenges such as: inadequacy of urban conservation management policies and processes focused on heritage, absence of skills, training, and resources amongst decision makers and persistent conflict and competition between heritage conservation needs and developers' interests. Furthermore, the values and significance of Surat's tangible and intangible heritage is not fully recognized by its citizens and heritage stakeholders. A crucial opportunity exists for Surat to maximize the potential of heritage and reinforce urban identity for its present and future generations. Surat's context is representative of general trends and conservation challenges and therefore recommendations developed in this study hold the potential to offer interesting insights to the wider planners and conservationists' international community. This paper recommends thoughtful integration of sustainable heritage urban conservation into local urban development frameworks and the establishment of approaches that recognize the plurality of heritage values.