Dimensions of cost misperceptions obstructing the adoption of sustainable buildings

Ekung, Samuel; Odesola, Isaac Abiodun; Oladokun, Michael Gbolagade

doi:10.1108/sasbe-10-2020-0160

Cited by 8 publications

(5 citation statements)

References 54 publications

(96 reference statements)

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“…Critical stakeholders also have the responsibility to disseminate this knowledge across educational segments, industry, public and practice to quicken the transfer of this knowledge to project implementation. Ekung et al (2021) posited that improved education and awareness are objective to entrench suitable cost perception needed by stakeholders during sustainable design adoption.…”

Section: Discussionmentioning

confidence: 99%

Green cost premium for attaining energy-efficiency rating in Nigeria's hot-humid residential buildings

Ekung

Odesola

Adewuyi

2021

IJBPA

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PurposeThe dearth of green standards (GS) in sub-Saharan Africa is alarming and the green cost premiums (GCP) in seeking certification in emerging markets are scanty. This paper studied the Building Energy-Efficiency Code of Nigeria (BEEC) and estimated the potential GCPs associated with the various energy-efficiency ratings.Design/methodology/approachThe study retrofitted 150 conventional residential bungalow and maisonette buildings using BEEC's energy-efficiency interventions and performed analytical estimating of the retrofitted designs. The mean cost premium associated with each energy-efficiency intervention is presented as well as their financial benefits and payback periods. The benefits are achievable financial-savings due to a reduction in energy consumption and savings in electricity payment estimated from the average energy demands of each building. An independent t-test was further conducted to determine the cost differential between energy-efficient design (ED) and conventional design over a five-year period.FindingsThe potential GCPs and their payback periods are actually less than feared. The study showed that less than 5% and 21% extra funding would be required to achieve 1 to 4-Star and 5-Star energy-efficiency ratings involving passive design interventions and photovoltaic systems. Passive and active design interventions produced a financial savings of $8.08/m2 in electricity payment and $2.84/m2 per annum in energy consumption reduction. The financial-savings ($10.92/m2) was objective to pay-off the GCPs in less than four years. The independent t-test analysis showed the cost of ED is more economical after four years into the project lifecycle.Originality/valueThe research provides cost benchmarks for navigating cost planning and budgetary decisions during ED implementation and births a departure point for advancing energy-efficient construction in developing markets from the rational economic decision perspective.

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Section: Discussionmentioning

confidence: 99%

Green cost premium for attaining energy-efficiency rating in Nigeria's hot-humid residential buildings

Ekung

Odesola

Adewuyi

2021

IJBPA

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“…Alpha Cronbach reliability test was performed to determine the consistency of respondents' views about the significant problems caused by the COVID-19 pandemic in the construction industry. The Cronbach test is valid at a value greater than 0.70 (Ekung et al, 2022). The measurement constructs and variables in the study showed strong internal coherency with a Cronbach alpha value (0.823 > 0.70); therefore, the inter-item consistency and instrument reliability are deemed significant (0.823>0.70).…”

Section: Discussionmentioning

confidence: 77%

“…Construction professionals were deemed suitable for the study based on the direct impact of COVID-19 problems on their operations as well as their organisations. Ekung, Odesola, and Oladokun (2022) reported that quantity surveying consultancy outfits in the region have witnessed declined commissions since early 2020; therefore, professionals in this category are a veritable source of data for uncovering the problems caused by the COVID-19 pandemic. Studies have also portrayed the knowledge of construction professionals as a rich repository of experience to analyse the effects of risk on construction operations and sector performance (Ekung et al, 2021a;Ekung, Okonkwo, & Nwosu, 2021b).…”

Section: Methodsmentioning

confidence: 99%

Problem Caused by COVID-19 Pandemic on the Construction Industry of Akwa Ibom State, Nigeria

Asuquo Okpo,

Offiong

2023

INTREST

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The chances to remedy the construction industry from its diverse problems have weakened due to the breakout of the COVID-19 pandemic in 2020. Although the pandemic is almost reduced to history, its impacts linger with acute effects on the industry’s performance. This study investigated the impact of the COVID-19 pandemic on the construction sector of Akwa Ibom State, Nigeria with a specific focus on problems caused by the COVID-19 pandemic. Using survey research design, structured questionnaires were administered to 213 respondents (61 Architects, 32 builders, 46 quantity surveyors, and 74 Civil Engineers). Data analysis involved mean item scores, Chi-Square and Kruskal Wallis tests. The findings revealed that COVID-19 has severed the movement of people and interpersonal relationships, delayed project timelines, escalated transportation problems, and induced high costs of construction resources and project costs. The implication shows that stakeholders in the construction industry are still glued to work ethics during the COVID-19 period or are yet to modify behaviours into the industry norms in terms of human relations and movement. A change in perception is needed to restore the stakeholders to the traditional way of life through an awareness campaign, while the government needs to strengthen economic recovery policies and institute pro-construction industry parameters to reduce the cost of construction resources and overall project costs to accelerate the recovery path of the sector.

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“…Remarkably, there are only two articles in infrastructure project literature that define cost drivers (Ekung et al 2021;Wang and Horner 2007). Ekung et al's (2021) definition is more transferable in research due to its general terminology, whereas Wang and Horner's (2007) is more pragmatic, proposing the "mean value theorem" which uses the BoQ to determine cost drivers. Definitions are mainly given by practitioner institutions (Australian Government 2018;DOE 2018;GAO 2020;RICS 2015).…”

Section: Defining Infrastructure Project Cost Driversmentioning

confidence: 99%

The Cost Drivers of Infrastructure Projects: Definition, Classification, and Conceptualization

Watton,

Unterhitzenberger,

Locatelli

et al. 2023

J. Constr. Eng. Manage.

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Reducing cost is a critical objective for project teams. However, unlike the research on topics such as cost overruns, cost reduction literature is limited. Previous studies have primarily examined cost estimation/reduction models or high-level cost reduction strategies. Therefore, it is necessary to identify specific actions that project teams can take to reduce cost. By focusing on the "cost drivers" of infrastructure projects, researchers have a practically relevant lens through which cost reduction can be promoted and studied. Thus, this integrative literature review establishes a foundation for infrastructure project cost drivers knowledge, addressing three research questions revolving around deriving a definition, classification scheme, and conceptual framework of cost drivers. This paper first produces a definition of cost drivers by critically analysing cost drivers concepts/perspectives and existing definitions. Second, cost drivers were drawn from relevant articles and classified to produce a taxonomy of 14 key cost drivers. Third, a conceptual framework (two-by-two matrix) of cost driver types was developed to acknowledge the influence project teams can have. Finally, a research agenda proposes further investigation in cost drivers/reduction research regarding each cost driver, apt research methods, and necessary project contexts. This paper's theoretical contribution is a deepening of infrastructure project cost drivers knowledge using a definition, taxonomy, and conceptual framework. The practical contribution is a deepened awareness of the key opportunities forand threats tocost reduction for project teams, as well as a knowledge of those cost drivers that they actually have an influence over, i.e., to reduce their project's cost.Popular topics in the realm of cost reduction in project/construction management literature tend to be primarily focused on reducing cost overruns or cost estimation inaccuracy, through analysing either the human-based determinants (e.g.

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Dimensions of cost misperceptions obstructing the adoption of sustainable buildings

Cited by 8 publications

References 54 publications

Green cost premium for attaining energy-efficiency rating in Nigeria's hot-humid residential buildings

Green cost premium for attaining energy-efficiency rating in Nigeria's hot-humid residential buildings

Problem Caused by COVID-19 Pandemic on the Construction Industry of Akwa Ibom State, Nigeria

The Cost Drivers of Infrastructure Projects: Definition, Classification, and Conceptualization

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