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The paper aims to identify the critical constraints that impede heritage building (HB) facility managers from discharging their duties effectively and develop an index model to guide HB maintenance management (HBMM) practitioners to the critical constraints.

A literature review was conducted to identify HBMM constraints. Facilty management practitioners assessed the constraints' significance through an online survey. The factor analysis was used to shortlist and group the constraints, and the constraint clusters were analyzed by the fuzzy synthetic evaluation technique. A significant index cluster to determine HBMM constraints criticality was generated using the linear additive model.

Embracing a total of 16 HBMM constraints, the three clusters identified are: (1) managerial and inadequacy constraints, (2) pressure and bureaucracy constraints and (3) HB peculiarities constraints. Based on the generated significant index, the HB peculiarities cluster was identified as the most significant.

The study was conducted in a particular jurisdiction, limiting the generalizability of the result. Future research should address this limitation by covering more jurisdictions.

The significant index model (SIM) developed enables HBMM practitioners to objectively assess the criticality of HB constraints and facilitates them to effectively strategize and allocate resources for HBMM.

The SIM, which transforms subjective judgment into the objective assessment of the HBMM constraints' criticality, can assist practitioners, policymakers and other HBMM stakeholders in implementing strategies for the sustainability of HBs.

Designing for the future sustainability and adaptability of building assets contributes to waste and emission reduction. Moreover, sustainable design and conservation principles are necessary for achieving sustainable and adaptable built heritage. The purpose of this paper is to introduce the improved adaptSTAR model in regards to maximising the future adaptive reuse and sustainability of existing built heritage and its surroundings.

A comparative study of two iconic nineteenth century heritage assets in Australia and Hong Kong is undertaken to highlight the need to forecast the future adaptation of heritage buildings in order to guarantee their continuous reuse and sustainability in an urban context.

Findings show that the functional, technological and legal attributes of these two nineteenth century heritage buildings require improvement so as to ensure their future adaptivity. The upgrading of heritage buildings for environmental sustainability is also deemed necessary.

The originality of this paper pertains to the advancement of the adaptSTAR tool in evaluating the future adaptivity of existing built heritage as well as new built environments whilst considering their economic, environmental and social values.

The purpose of this study is to identify the barriers that hinder the implementation of age-friendly initiatives in smart cities.

A systematic review of the literature was conducted using Scopus search engine. Relevant keywords were used to discover 81 publications in academic journals. The titles, abstracts, keywords and full texts of the publications were examined to select 39 publications that were relevant for identifying the barriers that hinder the implementation of age-friendly initiatives in smart cities. The contents of the 39 relevant publications were analysed to ascertain the key barriers. A system thinking approach was adopted to understand the interaction among the barriers.

The study identified five key groups of barriers – namely physical barriers and environmental characteristics, technological barriers, social barriers, financial barriers and political barriers – that smart cities encountered or are likely to encounter in implementing age-friendly initiatives. Moreover, practical examples of good age-friendly implementation practices were highlighted.

A limitation of this study is in the number of publications reviewed. Despite the comprehensive review, the number of publications reviewed may not be exhaustive. This is justified by the inapplicability of considering all possible keywords in one review study.

The systemic perspective of the barriers that hinder the implementation of age-friendly initiatives in smart cities would support policymakers in formulating policy recommendations to improve age-friendliness in cities.

This study underscores the variable and dynamic nature of developing age-friendly smart cities and forms novel basis for gaining insights into the multiple factors that can promote the integration of age-friendly initiatives within smart cities.

With the increasing use of small unmanned aircrafts (SUAs), many countries have enacted laws and regulations to ensure the safe use of SUAs. However, there is a lack of industry-specific regulations accounting for the unique features of construction-related SUA operations. Operating SUAs in the construction industry is attributed to specific risks and challenges, which should be regulated to maximize the utility of SUAs in construction. This study, therefore, aims to develop a multi-dimensional regulatory framework for using SUAs in the construction industry.

A combination of quantitative and qualitative methods was used to compare seven selected national/regional SUA regulations to identify the applicability of implementing the existing regulations in construction. The interview surveys were then conducted to diagnose the challenges of construction-related SUA operations and gather interviewees' suggestions on the regulatory framework for SUA uses in construction.

The research found that some challenges of construction-related SUAs operations were not addressed in the current regulations. These challenges included the complex and time-consuming SUA operation permit, lack of regulation for special SUA operations in construction, insufficient regulatory compliance monitoring and a lack of construction-related remote pilots' training. A regulatory framework was then developed based on the findings of comparative analysis and interview surveys.

This study mainly compared seven representative countries/regions' regulations, leading to a small sample size. Further research should be carried out to study the SUA regulations in other places, such as South Africa, South America or Middle East countries. Besides, this study's respondents to the interviews were primarily concentrated in Hong Kong, which may cause the interview results to differ from the construction industry in other countries/regions. A large-scale interview survey should be conducted in other places in the future to validate the current findings.

The proposed regulatory framework provides a reference for the policy-makers to formulate appropriate industry-specific SUA regulations and improve the applicability of SUA regulations in the construction industry. It sheds light upon the future of SUA regulations and the development of regulatory practice in this area.

This study is the first to propose a multi-dimensional regulatory framework for operating SUAs in construction by comprehensive policy comparisons and interviews. The regulatory framework offers a fresh insight into the unexplored research area and points out the direction for subsequent studies on SUA regulations in the construction industry.

This study aims to evaluate the relationship between the major factors of social value and the willingness to pay amount for conserving a historic site, using Hong Kong as a case study of a dense urban city with immense tension between conservation and development. It also evaluates, in monetary terms, the social values, which are almost impossible to measure in built heritage conservation.

It adopts evaluation ratings and the contingent valuation method to estimate Hong Kong citizens’ willingness to pay (WTP) for the conservation of the Central Police Station compound.

The results of 256 surveys suggest that the extent to which the historic site can provide a “sense of place and identity”, “social inclusion” and “community participation” is positively correlated to the WTP amount. The respondents’ satisfaction with the new use of the site, their work location and education level affected the amount they were willing to contribute to the conservation project. The reasons given for not being willing to contribute were also analysed to provide insights for cultural heritage policy.

The findings provide an enhanced understanding of the relationship between the major factors of social value and the WTP amount. This study proposes a partial tool to elicit the non-market value of heritage site which should be supplemented with experts’ evaluation to assist decision-making. It enhances public participation, particularly in the public–private partnership model of heritage conservation. Thus, it provides valuable insights for policymakers and planners to understand the public’s perception on the value of heritage conservation in cities facing immense redevelopment pressures.

This study aims to examine whether there are significant differences between laymen's, professionals' and policy makers' evaluations of the conservation of historic buildings.

The research began with interview surveys using a sample of laymen and professionals in the built environment and it examined their evaluation standards of a sample of 25 historic buildings in Hong Kong. The research also used the controversial Queen's Pier case to examine the extent to which different preferences of conservation between laymen and professionals and policy makers has led to its conservation campaign.

The results indicate that laymen and professional groups evaluate historic buildings based on slightly different criteria. The research also reveals that their preference for what is worth conserving is different from policy makers. The debate over the conservation of the Queen's Pier illustrates a wide range of issues other than differences of preference that may have stimulated the campaign.

The sample size of the respondents and the sample buildings are limited due to manpower resource and funding. Further study can expand the sampling size.

The study is original research which illustrates the differences between laymen's, professionals' and policy makers' evaluation criteria and assessment of historic buildings. It recommends a greater understanding of all stakeholders' interests in heritage conservation and the incorporation of the public's view into legislative and administrative procedures in designating and listing historic buildings.

The purpose of this paper is to identify a list of underlying considerations in choosing the appropriate economic valuation method for use in the conservation of historic property and to highlight the importance of non‐use values in making decisions.

A thorough literature review is conducted to provide a concise overview of the most commonly used economic valuation methods in the cultural heritage field. The stated and revealed preference methods were analyzed. Their theoretical basis, methodology and analysis procedures are described. By highlighting the strengths and limitations of these evaluation methods for use in the different context, a list of underlying factors for choosing the appropriate method for different decision‐making problems in managing historic properties were deduced.

The underlying considerations in choosing the appropriate evaluation method in historic properties include “Matching the objectives ”, “Evaluate use or non‐use values ”, “Scope of evaluation ”, “availability of data”, “Time and cost of conducting the methods”, “Methodological procedures”, “Analysis of the methods”, and “Local contexts where the techniques will be applied”.

The long‐term significance of this study is to enhance a holistic understanding of the quantitative approach to evaluate the value of historic properties. This enhanced understanding should help to inform the decision‐makings on comparing and prioritizing the management of heritage facilities when confronted with limited resources.

Most provincial town centres in New Zealand typically feature old and vacant historical buildings, the majority of which possess heritage values. The growing perception that it is cheaper to repurpose vacant historical buildings rather than demolishing and rebuilding them is one of the factors that have made the adaptive reuse approach so popular. However, will this also be the case for provincial town centres in New Zealand? The purpose of this paper is to identify and explore the key factors that could influence the efficacy of adaptive reuse, and check for significant differences in the effect that each perceived factor would have on the adaptive reuse efficacy as a justifiable resilient and sustainable approach towards the regeneration of a major provincial town centre in New Zealand that is currently experiencing inner-city shrinkage.

A focus group workshop was conducted with 22 stakeholders involved in an existing town centre regeneration agenda for Whanganui. Closed-ended questionnaires were administered to the workshop participants to measure their opinions regarding the efficacy of the adaptive reuse approach for the regeneration of Whanganui’s town centre. The participant mix comprised a combination of structural engineers, quantity surveyors, architects, estate valuers, building owners/developers, legal representatives, heritage representatives and local government council representatives.

The study reported a high proportion of respondents that strongly agreed to the positive impacts of adaptive reuse with regards to the discussed priority aspects, hence, justifying the efficacy of the approach, towards delivering a vibrant town centre for Whanganui. Also, the Friedman’s analysis suggests that no significant differences existed among all perceived adaptive reuse efficacy criteria by the workshop participants, therefore justifying the approach.

This paper’s originality pertains to the practicality of changing the use of vacant historical buildings in Whanganui, which is one of New Zealand’s major provincial town centres, to renegotiate resilience and sustainable urban regeneration for the area.

This study aims to identify the critical success factors of public private partnership (PPP) power projects in Ghana and further evaluates the most significant critical success factors (CSFs) influencing both the public and private sector participation in PPP power projects.

Ranking-type Delphi survey in two rounds was conducted to establish a comprehensive list of critical success factors of PPP power projects. Using purposive and snowball sampling techniques, experts were targeted for the Delphi survey. Mean score ranking, Cronbach’s alpha coefficient and Kendall’s concordance were used for analysis.

From the list of 37 critical success factors, 9 CSFs were deemed to be extremely significant. The five topmost CSFs were as follows: shared authority, trust and communication between public and private sectors; necessity of power project; debt guarantee to enable private partner to raise funds from the local or international financial markets; appropriate risk allocation and risk sharing; and thorough and realistic assessment of cost, projections and benefits.

The CSFs identified and prioritized in this study have the propensity to trigger policy development towards the PPP power sector in Ghana and developing countries that shares similar context. This is because the study has wide implications for financing, politics, procurement, regulations, legal and capacity building.