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The purpose of this paper is to identify and validate user requirement related building performance attributes and sub attributes for performance evaluation of government residential buildings.

User requirements in a building were listed from ISO 6241-1984 (E). Seven building performance attributes were identified through literature review and linked with the user requirements. Three more attributes not directly related to building performance but that could influence user satisfaction were also identified. The attributes were grouped into physical, environmental and external factors to suit the intervention strategies proposed to be implemented by maintenance agencies to enhance user satisfaction. The need for amplifying the attributes for better comprehension by occupants was felt; hence, characteristics of each of these attributes were listed based on literature survey and review. In total, 42 such sub attributes were identified to amplify ten attributes. To validate the adequacy of these attributes, an online survey was launched to garner feedback on first adequacy of the attributes and secondly to confirm whether there is a necessity for amplification of attributes for better comprehension by occupants. In total, 200 responses were received through the online survey, and the data received were categorized as per gender, location, sector, profession and finally civilian/military.

The outcome of the survey revealed that 84% of the participants felt that the attributes were adequate enough to assess building performance and 75% of them agreed that amplification of attributes through sub attributes as essential for better comprehension and to avoid ambiguity in response. Also the seven identified attributes were ranked from 1 to 7 with 1 being the most important. Weights of each attribute in the scale of 1 were also arrived at based on the responses. Similar exercise was carried out for all sub attributes.

Present research is confined to government residential buildings that are constructed and maintained through public funds and hence individual occupants are not constrained by economics. Other type of building infrastructure used for training, sports, storage, medical, etc., will have certain more specific performance parameters in addition to the ones identified in this paper for residential buildings. Economics also become a factor from users' perspective in case of private residential buildings which does not form part of the scope of this paper. However, as a future scope, the number of attributes can be escalated depending upon the type of building being surveyed, keeping the identified attributes as core attributes.

This paper links the end user satisfaction with building performance and the outcome of surveys will provide useful insights to the behaviour of buildings as well the efficiency and effectiveness of the existing maintenance management systems. Survey based on these attributes and sub attributes will enable the facility managers to ascertain the satisfaction level of occupants with respect to building performance, satisfaction with respect to external factors such as accessibility, amenities and societal issues other than building performance. It will enable the facility managers and decision makers to prioritize their maintenance according to importance, availability of funds, etc. It will also provide a data bank over the years that can indicate the changing aspirations of occupants of government residential buildings. This will enable policymakers to review specifications, authorizations and scales.

This paper links user requirement with building performance. ISO 6241-1984(E) forms the basis for user requirement. Survey based on these user requirement related building performance attributes shall enable facility managers prioritize their maintenance efforts in management of facilities.

Present research on assessing performance of residential buildings is done for specific purposes and not holistically. The indicators, factors and attributes considered for evaluation are not consistent and are broadly based on knowledge base of the author. The purpose of this research is to identify building performance attributes based on user requirement.

With ISO 6241-1984(E) as a basis for universal acceptance, user requirements have been listed and based on these user requirements, related building performance attributes have been identified. End-user satisfaction is of primary importance to gauge performance of a facility. A quantified approach in evaluation of performance of a facility will enable a facility manager to assess the efficacy of the present policies pertaining to operation and maintenance of the facility. It will also provide valuable inputs to policy makers in initiating measures toward the goal of achieving desired user satisfaction. Performance measurement is done to measure the value created by the services, to justify the investment made in creating the facility or to determine if any additional investments are required for improvement of the facility.

In this literature review, an attempt is made to identify user requirements based on an internationally renowned standard ISO 6241-1984 (E), as a base and group building performance attributes on these requirements. The identified attributes are grouped into physical, environmental and external factors for ease of garnering user satisfaction and subsequent flexibility in assessment of data based on requirement of the surveys carried out for evaluation.

The identified list of user requirement-related building performance attributes is limited to government residential buildings. The research needs validation through a full-fledged user satisfaction survey.

It provides a comprehensive list of attributes for assessing performance from physical, environmental and external factors, enabling wholesome assessment of the performance of buildings. Moreover, as a universally accepted document ISO 6241-1984 (E), forms the basis of the paper, its application is not limited to a region.

Lot of research is happening in the field of assessing building performance. User satisfaction by virtue of being difficult to quantify, it has not found much favor till now. This attempt is to furnish a comprehensive list of building performance attributes that will enable a multipurpose survey which will not be based on perception of the researcher but on a universally accepted document. The premise of research is that end-user satisfaction is of primary importance to gauge performance of a facility.

The purpose of this study is to develop a user-centric facility maintenance model through user satisfaction index linked intervention strategies for public housing.

User requirements are standardized by ISO 6241-1984(E), building performance attributes (BPAs) influencing those user requirements are identified. Selected BPAs are amplified as sub attributes characterizing BPAs. Grouping of BPAs are done to suit established hierarchy of government facility maintenance (FM) agencies. Post validation of BPAs/sub attributes for adequacy, they are ranked and weights assigned through expert survey. Questionnaire designed to garner user feedback based on BPAs and sub attributes to develop a user satisfaction index (USI) that can enable quantification of user feedback. A theoretical framework for interventions is designed which can be enmeshed in existing hierarchy of FM agencies.

84 per cent of expert survey group comprising architects/planners/engineers/facility managers/consultants agreed on adequacy of attributes and 78 per cent endorsed necessity for amplification of BPAs through sub attributes. USI shall facilitate comparison of pre- and post-implementation of interventions. A theoretical framework for FM agencies is developed for interventions.

The FM model presently is limited to application only in public housing. For wider application to other built facilities, choice of BPAs need to made accordingly. As the implementation of interventions and its comparison is likely to take at least a financial year, the theoretical framework can be validated subsequently as a future scope of research.

The biggest implication of this FM model is that the most important stakeholder, that is, end user/occupant gets to register feedback on building performance. This model establishes accountability of government FM agencies and also validates the methods and processes adopted for maintenance of built facilities.

A section of the feedback comprises issues not directly related building envelope but societal issues. This feedback in the long run can become a repertoire of data for administrative agencies to map changing aspirations of government employees with respect to authorization/entitlements.

Quantification of user satisfaction is an inevitable necessity in spite of being a qualitative aspect. This study makes a unique attempt to provide a framework to establish accountability of government FM agencies which is presently non-existent.

Today, construction sector of most emerging economies, including India, is witnessing sharp growth prospects on the one hand and pressure to effectively and efficiently contribute to the national development on the other. The Indian construction industry is one of the major stimulants of the economic and social growth of the nation. However, the sector is confronted by numerous issues, thereby reducing its efficacy and unhindered growth prospects. The purpose of this paper is to extract various industry impediments and suggest a prioritized listing of challenges faced by the industry using the Grand Challenges Approach (GCA).

Motivated by the GCA this study uses the Delphi process for consensus building in the expert panel, comprising of 39 professionals from across various industry stakeholders. A qualitative round was first used to acquire views on the challenges. Consequently two quantitative Delphi rounds were conducted to extract Top-10 Challenges for the industry based on two aspects – priority and impact. A wider industry survey was also carried out, which served as an unscientific validation of the Delphi Study.

Grand Challenges facing the Indian construction sector were identified. Addressing these challenges at the national level has the potential of transforming the industry to highly efficient, quality cantered and bullish industry capable of delivering successfully.

The GCA, used extensively by the health sector internationally, is used for the Indian construction industry in a novel way to set an agenda for enhancing its operational efficiency.

This study aims to investigate the compressive strength of concretes incorporating Linz-Donawitz slag (LD slag) as partial replacement for natural fine and coarse aggregates and compare them with traditional concrete.

The natural fine and coarse aggregates were replaced by weight simultaneously up to 100% with LD slag aggregates at an incremental increase of 20%. Concrete of grades M20, M25, M30, M35 and M40 were cast, cured and tested with standard cube specimens to study the density and compressive strength of reference and LD slag aggregate concretes (LDSACs). The concrete specimens were exposed to elevated temperatures, i.e. 100 to 900 °C at an equal interval of 100 °C and tested to study the variation in density and residual compressive strength.

The results from the experiments reveal that the LDSAC yields a higher density than that of the reference concrete and also undergo less density variation when exposed to elevated temperatures. In addition, the residual compressive strength of LDSAC specimens was significantly higher than that of the reference concrete.

LD slag is believed to be stronger and more durable than locally available limestone aggregates or blast furnace slag. Moreover, it is necessary to study its strength and other properties to determine whether it can be successfully used as an aggregate in concrete universally.

Use of LD slag as aggregates in concrete will convert LD slag into a value added product and as an alternative to the existing natural aggregates which will help in maintaining ecological balance and save valuable lands.

The economically weaker section of the society may now use LDSAC as waste utilization will bring down the overall cost and hence it will benefit people on large scale.

Use of LD slag as aggregate in concrete can help find an alternative to the existing natural aggregates which will save the ecosystem and at the same time help in reducing the industrial waste on a large scale.

It is now well-established that good water quality is associated with economic prosperity, reduced incidence on public health and the good functioning of the various ecosystems found in our environment. Water contamination is mostly related to both diffused (agricultural lands and geologic rock degradations) and point sources of pollution. Mauritius has many water resources which depend solely on precipitation for their replenishment. Water parameters which are of relevance include total dissolved solids (TDS), temperature, pH, electrical conductivity, turbidity, dissolved oxygen, dissolved and particulate organic carbon and major cations and anions. The traditional methods of analysis for these parameters are mostly using electrical and optical methods (probes and sensors in the field), while chemical titrations, Flame AAS and High-Performance Liquid Chromatography techniques are carried out in the laboratory. Image Classification techniques using neural networks can also be used to detect the presence of contaminants in water. In addition to basic water quality parameters, the field sensors range have been extended to cover important major ions and can now be integrated with Artificial Intelligence (AI)-based models for the prediction of variations in water quality to better protect human health and the environment, reduce operation costs of water and wastewater treatment plant unit processes.