Building Quality Research Articles

The impact of team building excellence on creating a culture of quality: a quality managers’ perspective

Purpose Creating, enhancing and sustaining a culture of quality is critical to business continuity and sustainability. It is necessary to study the enablers and motivators, specifically excellence in building work teams and its relationship to the culture of quality. This study aims to examine excellence in team building in terms of understanding the team’s mission, team characteristics and accountability in engineering industries companies in Jordan. It also investigated the level of quality culture in these companies and the relationship between excellence in team building and quality culture. Design/methodology/approach The variables of this study were measured through a questionnaire distributed to quality managers in engineering industries companies in Jordan. The questionnaire consisted of two parts: excellence in team building (understanding of team mission, characteristics of team members, accountability) and quality culture. The collected data were analyzed using descriptive (means and standard deviations) and inferential statistics (t test and regression). Findings The results indicated that the level of excellence in team building, understanding of the team mission, characteristics of team members and accountability and the level of quality culture fall within the “very good” point range on the scale. The results also indicated a statistically significant positive relationship between team building excellence and quality culture. Originality/value To the best of the author’s knowledge, this study is the first applied study that addressed excellence in team building, investigated the level of quality culture and the relationship between team building excellence and quality culture. The results support the role of team building excellence in creating, enhancing and sustaining a culture of quality.

A Numerical and Experimental Study to Compare Different IAQ-Based Smart Ventilation Techniques

Maintaining indoor environmental quality in residential buildings is essential for occupants’ comfort, productivity, and health, with effective mechanical ventilation playing a key role in removing or diluting indoor pollutants. A two-week experimental campaign was conducted in an apartment in Lyon, France, known for its poor urban air quality, assessing temperature, relative humidity, CO2, and PM2.5 concentrations. A model verification study was performed to compare experimental measurements against numerical modeling in the living room and bedroom, leading to errors in the accuracy of the sensors. In addition, this study also investigates the impact of different ventilation strategies on indoor air quality. This research evaluates a baseline mechanical exhaust-only ventilation approach with constant air volume against two innovative smart ventilation approaches: mechanical exhaust-only ventilation with humidity control and mechanical exhaust-only ventilation with room-level CO2 and humidity control. A key contribution of this research is the novel coupling of multizone simulation models (DOMUS and CONTAM) with a CFD tool to refine pressure coefficients on the building façade, which enhances the accuracy of indoor air quality predictions. The smart ventilation strategies showed improvements, including a 20% reduction in CO2 concentration and a 5% reduction in the third-quartile PM2.5 concentration, highlighting their effectiveness in enhancing ventilation and pollutant dilution. This research provides valuable insights into advanced ventilation strategies and modeling techniques in urban environments.

Dynamic Indoor Environmental Quality Assessment in Residential Buildings: Real-Time Monitoring of Comfort Parameters Using LoRaWAN

This study addresses an identified literature gap regarding indoor environmental quality in residential buildings, where the primary focus has traditionally been on energy performance rather than comfort optimization. Leveraging the low-cost and easy-to-implement LoRaWAN protocol, this research collects and analyses real-time data on comfort parameters, including temperature, CO2 levels, humidity, lighting, atmospheric pressure, and total volatile organic compounds (TVOC) across various buildings within the INCUBE EU project. The results highlight the dynamic nature of the parameters and emphasize the importance of continuous monitoring to enhance comfort and energy efficiency in smart residential buildings. The findings advocate for integrating technologies like LoRaWAN to optimize indoor environmental quality, ultimately improving residential comfort and occupant well-being.

Student Accommodation Selection Factors: The Perspective of Tertiary Students in Public Universities in Ghana

Housing occupants consider many factors in accommodation selection to attain their perceived needs and satisfaction. This study, therefore, sought to identify the key factors influencing the choice of student accommodation among public tertiary students in Ghana. The article adopted a quantitative research approach was used. Structured closed-ended survey questionnaires were sent to 626 public tertiary students in Ghana using a convenience sampling technique. The questionnaires were distributed through personal delivery at the student residences. The study employed descriptive analysis to present the findings, using mean scores, standard deviation, exploratory factor analysis, and regression analysis. The findings from the exploratory factor analysis identified forty-one factors in the four components, including the building, the facilities available, proximity and Management, that influenced the selection of student accommodation among public tertiary students in Ghana. However, the regression analysis revealed that three of the four components influenced the selection of student accommodation: facilities available, proximity and building. The categorised factors highlight the facilities students value most. Accommodation providers can use this information to optimise the planning and provision of amenities such as internet connectivity, communal spaces, and recreational facilities, aligning them with student preferences and fostering a positive living environment. The categorisation of factors into building quality, available facilities, proximity, and management provides guidelines on various dimensions influencing accommodation selection, offering a practical tool for researchers and student housing stakeholders.

Natural cross-ventilation configurations: Comparison using different evaluation parameters

The purpose of this research is to compare different natural cross-ventilation (NCV) configurations in a generic isolated building using various evaluation parameters. NCV is relevant for indoor air quality (IAQ) and thermal comfort in buildings. Validated computational fluid dynamic (CFD) simulations are employed. The NCV configurations are categorized into axial and corner, and four heights of windows (bottom, middle, top, and upward) were considered. Two kinds of evaluation parameters are employed: those that consider the indoor airflow distribution (IAD) and those that do not. Among the first group, a new parameter is proposed. It is found that the performance of each configuration improves by increasing the wind velocity and wall porosity. The evaluation parameters that consider IAD indicate that corner configurations outperform axial ones, contrary to what is indicated by the evaluation parameters that do not consider IAD. The corner upward configuration produces the highest average velocity and a high-velocity homogeneity in the living zone, which can improve thermal comfort in hot conditions. The bottom one produces the highest average velocity in the living zone for axial configurations. The window height has little influence on IAQ among corner configurations, while the middle one performs better for axial configurations. This research compares these configurations for the first time and reveals that corner configurations outperform axial configurations. The study results emphasize the importance of assessing natural ventilation by employing parameters that consider the IAD.

Evaluating the Impact of Hospital Accreditation on Patient Safety Culture in Saudi Arabia Healthcare Facilities.

The impact of hospital accreditation on the organizational safety culture among healthcare workers, an essential indicator of patient safety, has yet to be directly quantified in Saudi Arabia's healthcare system. This study aims to investigate this impact to sustain and maintain a positive safety culture in Saudi Arabia's healthcare institutions. A cross-sectional assessment was conducted in five public hospitals in Makkah. Three hundred forty healthcare workers participated using a self-administered questionnaire. Data were analyzed using descriptive statistics, ANOVA, one-sample t-test, and multiple regression for a comprehensive understanding. Regression analysis revealed significant gender differences in patient safety ratings (B = 0.480, p < 0.001). Age positively influenced scores, with higher ages resulting in higher scores (B = 0.127, p = 0.041). The ratings were also associated with respondents' nationality (B = 0.169, p < 0.001) and education levels (B = -0.186, p < 0.001). Respondents rated disasters and training as the highest in patient safety culture, followed by facility safety and security, hazards and hazardous materials safety, utility and building safety, fire safety, and quality improvement. At the same time, leadership, commitment, and support received the lowest score. This study illustrates a strong connection between accreditation and improved patient safety, emphasizing the importance of quality improvement and leadership commitment. These insights can guide policymakers and healthcare executives in Saudi Arabia and similar countries toward developing a robust patient safety culture. It stresses the importance of considering human factors and organizational culture when developing patient safety models.

Research on the Influence of Rectifying Orifice Plate on the Airflow Uniformity of Exhaust Hood

Designing and improving collection systems for dust and toxic pollutants is crucial for improving the safety and indoor air quality of laboratory buildings. Push–pull ventilation systems with uniformly distributed parallel airflow have been proven to be of great help in this task. Designing exhaust hoods with parallel airflow distribution can effectively enhance the airflow uniformity of push–pull ventilation systems, especially when combining it with the implementation of rectifying orifice plates on the exhaust hoods. Therefore, this study combines a computational fluid dynamics (CFD) method and experimental approach to analyze the influence of key factors that lead to improvements in the airflow uniformity through the use of rectifying orifice plates, namely the aperture and porosity, as well as the number of rectifying orifice plates on the airflow uniformity of exhaust hoods. The study shows the following: (1) The aperture of the rectifying orifice plate considerably affects the airflow uniformity of the exhaust hood. Specifically, near the exhaust hood outlet, the airflow uniformity is negatively correlated with the aperture; conversely, near the exhaust hood inlet, the airflow uniformity is positively correlated with the aperture. (2) A rectifying orifice plate with a porosity of 35.43% can effectively improve the airflow uniformity of the exhaust hood. (3) Exhaust hoods with a double-layer rectifying orifice plate structure can improve airflow uniformity by approximately 40% compared to those with a single-layer structure. The above research results can guide the optimization of exhaust hood design to improve airflow uniformity, thereby effectively enhancing the capture efficiency of the push–pull ventilation system for dust and toxic pollutants and providing a safer environment for experimenters in laboratory buildings.

The Lifestyle and Quality of Life Among Nursing Students.

Nursing students will graduate as professional nurses and serve as community health role models. They need to start living a healthy lifestyle and having a good quality of life as soon as feasible. However, their attitudes and actions often reflect the opposite, as if their learning has little bearing on their lives. This study examines nursing students' lifestyle and quality of life, as well as the relationship between lifestyle and quality of life at a private university in Tangerang, Indonesia. This study is cross-sectional. The population comprised up to 220 third-year nursing students from one of Tangerang's private universities. The sample size was 147 students, drawn from convenience sampling. Data were collected online using the WHOQOL-BREF questionnaire and a lifestyle questionnaire that has been validated and reliable. The findings revealed that most students had a healthy lifestyle (72.1%) but a low quality of life (62.6%). Furthermore, there was a significant association between lifestyle and quality of life in nursing students (p-value 0.003). Nursing students must maintain a healthy lifestyle to have a good quality of life. Building quality of life in nursing students is crucial since it can improve their overall well-being and future care quality.

Public works, urban development, common goods

The role taken by public works requires us to use them to address the need to govern the complexity of the contemporary city, focusing its development and physical transformations on shared goals. The combination of urban regeneration and public works finds an outlet in intervention strategies for the quality of public space, public buildings, and architecture of civic value. In order to make public works an opportunity for shared regeneration, planning actions should aim at framing individual works within a broader strategic vision, dealing with the management of services (cultural, educational, social) to involve communities and stakeholders in organising urban enhancement methods. The construction of the ‘public city’ oriented to the common good should constitute a continuous path that allows neither pauses nor retreats. It should activate decision-making and governance processes that enhance citizens’ participation and develop synergies with private subjects, focusing on the social dynamics of the world of work, dwelling and culture.

Paradoxical Luxury in the Sint Maarten’s Property Market

This article outlines the concept of ‘paradoxical luxury’ derived through an ethnographic exploration of Sint Maarten’s high-end real estate market. Classic works analyzed luxury goods as markers of status and their consumption playing a role in reinforcing social stratification. More recent work points to the allure of luxury consumption as predicated upon references to heritage, tradition, durability, and quality as selling points while also serving older functions of display and stratification. The luxury concept has also been influenced by more recent concerns among consumers about issues such as sustainability. This study, however, reveals a luxury real estate market through which the ability to display status remains unclear as well as lacking key defining elements of luxury such as heritage and quality. Further, the cycle of repeated destruction of these properties due to seasonal hurricanes present a form of luxury that challenges the traditional views of the concept. As such, the marketed exclusivity and perceived value of properties are directly confronted by their vulnerability to natural disasters, sub-standard building quality and inferior local infrastructure, as well as lax regulatory framework. The concept of paradoxical luxury underscores the contradictory nature of luxury in this setting.

Modelling of Indoor Air Quality and Thermal Comfort in Passive Buildings Subjected to External Warm Climate Conditions

Air renewal rate is an important parameter for both indoor air quality and thermal comfort. However, to improve indoor thermal comfort, the air renewal rate to be used, in general, will depend on the outdoor air temperature values. This article presents the modelling of indoor air quality and thermal comfort for occupants of a passive building subject to a climate with warm conditions. The ventilation and shading strategies implemented for the interior spaces are then considered, as well as the use of an underground space for storing cooled air. The indoor air quality is evaluated using the carbon dioxide concentration, and thermal comfort is evaluated using the Predicted Mean Vote index. The geometry of the passive building, with complex topology, is generated using a numerical model. The simulation is performed by Building Thermal Response software, considering the building’s geometry and materials, ventilation, and occupancy, among others. The building studied is a circular auditorium. The auditorium is divided into four semi-circular auditoriums and a central circular space, with vertical glazed windows and horizontal shading devices on its entire outer surface. Typical summer conditions existing in a Mediterranean-type environment were considered. In this work, two cases were simulated: in Case 1, the occupation is verified in the central space and the four semi-circular auditoriums and all spaces are considered as one; in Case 2, the occupation is verified only in each semi-circular auditorium and each one works independently. For both cases, three strategies were applied: A, without shading and geothermal devices; B, with a geothermal device and without a shading device; and C, with both shading and geothermal devices. The airflow rate contributes to improving indoor air quality throughout the day and thermal comfort for occupants, especially in the morning. The geothermal and shading devices improve the thermal comfort level, mainly in the afternoon.

Adaptation of Post-fortress Buildings as an Enrichment of the Functional Programme of a Housing Estate on the Example of Fort VIII Służew in Warsaw

The article refers to the problem of adaptation of post-fortress objects from the 19th century located in the strict urban tissue in Poland. The authors of the text analyse the example of adaptation of Fort VIII Służew in Warsaw as a way of making common spaces in housing estates more attractive. The rapid demilitarisation of fortresses from this period caused by the development of the art of war and the subsequent dynamic development of urban planning after the Second World War resulted in the degradation and disappearance of these valuable monuments. The Russian ring fortress of Warsaw is now entirely within the urban fabric. Introducing additions and new utility functions is becoming a way of protecting the existing stock of often degraded spaces left behind by former forts. On the example of Fort VIII Służew, a number of activities related to adaptation, revitalisation and revalorisation of the existing urbanised residential space in Ursynów district are presented. The analysed object together with its surroundings is an example of a way to use post-fortress spaces for both utilitarian and cognitive purposes while respecting historic values. Age-old fortifications, so well preserved in Poland, significantly define and shape urban layouts. The research carried out by the authors of this text shows that appropriate use of the potential of post-fortress buildings from the 19th century can significantly improve the quality and character of colonial buildings and highlight the values associated with this type of specific monument.

Interpretable reduced-order optimization research for improving indoor environmental quality in buildings based on dimensional analysis and surrogate-based optimization

Implementing large-scale optimization designs and identifying optimal design variables in fields such as architectural engineering is crucial for improving indoor environmental quality. However, the high-dimensional nonlinear characteristics complicate the understanding of the optimization process and increase the difficulty of finding optimal solutions. This study proposes an interpretable reduced-order optimization (ROO) method based on dimensional analysis, which integrates numerous variables into a single reduced-order coefficient through a power form. The goal is to develop a reduced-order and approximately one-dimensional nonlinear relationship during the optimization process and to reveal the mechanisms of single-objective and multi-objective optimization, thereby enhancing the interpretability of the optimization process. The reliability of the ROO is validated through single-objective optimization of building thermal bridges and multi-objective optimization of squirrel cage fans. The study shows that the power in the reduced-order coefficient can be used to determine the sensitivity and impact of design variables on optimization targets. The nonlinear relationship between the composite structural parameters of the building thermal bridge and the total heat flux can be reduced to an approximately one-dimensional linear relationship, significantly reducing the total heat flux of the thermal bridge by 10.3 %. The ROO accurately describes the aerodynamic performance of the fan and its high-dimensional nonlinear relationship with eight design variables, eliminating optimization conflicts among multiple operating conditions and significantly enhancing the aerodynamic performance. The ROO method proposed in this study offers a new approach to making the optimization process more interpretable, playing a crucial role in optimization design and revealing optimization mechanisms in engineering applications.

Adaptive fusion graph convolutional network based interpretable fault diagnosis method for HVAC systems enhanced by unlabeled data

Fault diagnosis is critical in maintaining the operational stability and reliability of Heating, Ventilation, and Air Conditioning (HVAC) systems, which are crucial for ensuring indoor environmental quality and energy efficiency in buildings. However, traditional fault diagnosis methodologies face substantial challenges in accurately capturing the dynamic interactions within these systems and effectively utilizing unlabeled data. To overcome these limitations, an innovative fault diagnosis approach utilizing the Adaptive Fusion Graph Convolution Network (AFGCN) is proposed in this paper. This method significantly enhances the model's learning and inference abilities, particularly in scenarios with limited labeled data, by adaptively integrating the associative graph features of both unlabeled and labeled data. Furthermore, to augment the transparency and trustworthiness of the diagnostic outcomes, this paper introduces an interpretability analysis module. This module is designed to quantify the contribution of each sensor node in the fault diagnosis process. Experimental evaluations using the ASHRAE RP-1043, actual building operating chillers datasets, and LBNL FDD Data Sets_SDAHU indicate that this method offers substantial performance improvements in diagnosing faults in HVAC systems.

Exploring Current Techniques for Improving the Properties of New Concrete

In modern construction, the properties of new concrete are crucial for building quality and structural performance. Recent technological advancements have led to significant progress in enhancing the properties of new concrete. This study employs theoretical and experimental methods to explore the connection among shear stress and shear strain rate under vibration, the impact of aggregate substitution on concrete performance, and the rheological properties of moist shotcrete. The findings suggest that adjusting mix proportions and using additives can significantly improve concrete's strength, durability, and workability. This research provides engineers with a theoretical foundation for optimizing concrete mixtures and construction techniques, thereby improving overall building quality and construction efficiency. The findings suggest that sustainable materials can be used without compromising structural integrity, making the construction process more environmentally friendly while maintaining high performance standards. Furthermore, this study highlights the importance of understanding concrete behavior under various conditions to develop more resilient and long-lasting structures.

Case study: structural feasibility analysis for a reinforced concrete building

Currently, the residential building sector in Brazil is experiencing continuous growth, despite the adverse impacts caused by 2 years of the Covid-19 pandemic. Therefore, there is a demand for structural projects that enable the execution of these works from a structure that is viable from the point of view of safety, good conditions of use, comfort and economy. Technical and practical knowledge is a fundamental requirement for a good project, combined with skill in a technological analysis and sizing tool. Having said that, the present work proposed to develop the analysis and structural design, with the help of the Brazilian software TQS®, of a multi-family residential building in reinforced concrete, using both linear and nonlinear static analyses. The central motivation was to address structural challenges and ensure that the design complies with Brazilian standards, thereby improving the quality and safety of residential buildings. The work sought to follow all the design steps of a structure in order to meet the requirements recommended by Brazilian standards. Based on the analyses, it was possible to adopt solutions for the various structural problems that arose during the design and, finally, obtain the final document with all the details of the structure.

Application of a multi-criteria decision technique to assignation of acoustic classes

Acoustic performance evaluation of buildings prior to the acoustic classification, requires consideration of a number of factors with the corresponding quantitative criteria to be satisfied. It is of question how much the deviations can be compensated and whether all performance factors are equally important. This paper presents the results of a study on assigning priorities for each acoustic factor by using the analytic hierarchy process (AHP) - a multi-criteria decision technique - based on the expert evaluations. Eleven acoustic consultants rated seven acoustic factors, i.e. regulatory criteria of sound insulation, sound level and reverberation time, in pairwise comparisons. The data were aggregated after a consistency check and weights of each acoustic factor were calculated as well as weights of six acoustic performance classes ranging from A to F. The outcomes of this study resulted in a decision matrix, named as "acoustic scorecard" which can be used to obtain a single-number rating index for acoustic quality of buildings.

Innovative strategies for time-release PCE design and cement paste flowability control

Extending the retention time of cement paste flowability with the addition of admixtures containing slow-release components is standard practice for ensuring the continued building quality of cement-based materials. This study aims to control the release rate of PCE and enhance its time-varying dispersion effect in fresh cement paste by utilizing Time-dependent Release PCEs (TRPCEs) with varying side-chain structures. The structural characterization of the synthesized TRPCEs was investigated using GPC (Gel Permeation Chromatography), FTIR (Fourier Transform Infrared Spectroscopy), and 1H NMR (Proton Nuclear Magnetic Resonance) techniques. Furthermore, experiments were carried out on time-varying flowability with different dosages of TRPCEs to investigate the flowability changes under the time-varying release effect. The influence of TRPCEs on cement hydration was examined using isothermal calorimetry by measuring the early hydration heat of cement paste. The time-dependent adsorption behaviors of TRPCEs were also examined using a TOC (Total Organic Carbon) analyzer. The findings show that TRPCEs have a minor effect on the cement hydration process's rapid reaction period but little effect on its induction and acceleration periods because of variations in the initial dispersion effect. Additionally, the adsorption behaviors of TRPCEs on cement particles vary significantly due to the hydrolysis of slow-release groups. The varying adsorption and consumption of TRPCEs on cement particles and hydration products in different hydration phases are key controlling factors for the time-varying flowability changes in cement paste. Finally, this innovative approach offers a novel perspective for designing and preparing new types of PCEs with a strong capability for time-varying flowability retention.

Optimising indoor environmental quality: Development of a benchmarking tool for valuing performance in office buildings

A novel benchmarking tool, the Building Office Benchmark (BOB) tool, has been developed to evaluate the economic benefit of increased work performance by upgrading the indoor environmental quality (IEQ) in office buildings. Utilising post occupancy evaluations in Danish and Greenlandic office buildings (26 buildings in Denmark and 22 buildings in Greenland comprising a total of 153 offices), a database comprising registration of building properties, measurements of IEQ parameters and occupant responses has been established. This may be used not only to benchmark the indoor environment in office buildings but also to identify suboptimal conditions and, based on this, quantify the economic benefits of indoor environment upgrades.Informed by literature review findings, the tool's IEQ domains and weightings of different IEQ domains and parameters align with existing certification schemes. The tool may be used to outline the economic advantages of IEQ improvements, presented straightforwardly to building owners and tenants. Overall, the tool presents a framework for assessing and improving IEQ in office environments.

Factors Affecting the Indoor Air Quality and Occupants’ Thermal Comfort in Urban Agglomeration Regions in the Hot and Humid Climate of Pakistan

The World Air Quality Index indicates that Pakistan ranks as the third most polluted country, regarding the average (Particulate Matter) PM2.5 concentration, which is 14.2 times higher than the World Health Organization’s annual air quality guideline. It is crucial to implement a program aimed at reducing PM2.5 levels in Pakistan’s urban areas. This review paper highlights the importance of indoor air pollution in urban regions such as Lahore, Faisalabad, Gujranwala, Rawalpindi, and Karachi, while also considering the effects of outdoor air temperature on occupants’ thermal comfort. The study aims to evaluate past methodological approaches to enhance indoor air quality in buildings. The main research question is to address whether there are statistical correlations between the PM2.5 and the operative air temperature and whether other indoor climatic variables have an impact on the thermal comfort assessment in densely built urban agglomeration regions in Pakistan. A systematic review analysis method was employed to investigate the effects of particulate matter (PM2.5), carbon oxides (COx), nitrogen oxides (NOx), sulfur oxides (SOx), and volatile organic compounds (VOCs) on residents’ health. The Preferred Reporting Items for Systematic Reviews and Meta Analyses (PRISMA) protocol guided the identification of key terms and the extraction of cited studies. The literature review incorporated a combination of descriptive research methods to inform the research context regarding both ambient and indoor air quality, providing a theoretical and methodological framework for understanding air pollution and its mitigation in various global contexts. The study found a marginally significant relationship between the PM2.5 operative air temperature and occupants’ overall temperature satisfaction, Ordinal Regression (OR) = 0.958 (95%—Confidence Interval (CI) [0.918, 1.000]), p = 0.050, Nagelkerke − Regression (R2) = 0.042. The study contributes to research on the development of an evidence-based thermal comfort assessment benchmark criteria for the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Global Thermal Comfort Database version 2.1.