Buildings are among the largest consumers of electricity in the US. A significant portion of this energy use in buildings can be attributed to HVAC systems used to maintain comfort for occupants. In most cases these building HVAC systems run on fixed schedules and do not employ any fine grained control based on detailed occupancy information. In this paper we present the design and implementation of a presence sensor platform that can be used for accurate occupancy detection at the level of individual offices. Our presence sensor is low-cost, wireless, and incrementally deployable within existing buildings. Using a pilot deployment of our system across ten offices over a two week period we identify significant opportunities for energy savings due to periods of vacancy. Our energy measurements show that our presence node has an estimated battery lifetime of over five years, while detecting occupancy accurately. Furthermore, using a building simulation framework and the occupancy information from our testbed, we show potential energy savings from 10% to 15% using our system.

[ACM Press the 2nd ACM Workshop - Zurich, Switzerland (2010.11.02-2010.11.02)] Proceedings of the 2nd ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Building - BuildSys \'10 - Occupancy-driven energy management for smart building automation

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Applied Multivariate Techniques

El artículo tiene como objetivo evaluar el nivel de desarrollo de la capacidad de absorción realizada (RACAP) en las Pyme colombianas. Se parte de una muestra de 363 Pyme colombianas (Dane,2012), se usa una revisión de literatura con apoyo del análisis de contenido y un modelo de regresión lineal, que permiten mostrar la existencia de una correlación lineal positiva entre la adquisición y asimilación del conocimiento externo en las organizaciones objeto de estudio,. Palabras clave: Capacidades de absorción, capacidades de absorción potencial, medición de las capacidades de absorción ABSTRACT:

Measurement of potential absorption capacity in Colombia's innovative companies [Medición de la capacidad de absorción potencial en las empresas innovadoras de Colombia]

Contractor selection is one of the main activities of clients. Without a proper and accurate method for selecting the most appropriate contractor, the performance of the project will be affected. The multi-criteria decisionmaking (MCDM) is suggested to be a viable method for contractor selection. The analytic hierarchy process (AHP) has been used as a tool for MCDM. However, AHP can only be employed in hierarchical decision
models. For complicated decision problems, the analytic network process (ANP) is highly recommended since ANP allows interdependent influences specified in the model. An example is demonstrated to illustrate how this method is conducted, including the formation of supermatrix and the limit matrix.

Contractor selection using the analytic network process

Proceedings of the 32nd Annual ARCOM Conference, 5-7 September 2016, Manchester. UK, Association of Researchers in Construction Management

Capability Maturity Value in Construction – A Cities: A Panacea Development

Measures of Sustainable Construction Projects Performance

Due to increasing complexity of construction projects and the need to deliver projects to the satisfaction of clients with changing demand, various tools, techniques and methods have been introduced while some are gaining popularity in the construction industry. One of the existing tools are various project management techniques. The purpose of this study is to explore available project management tools and techniques that can be utilized to enhance construction project performance with a view to achieving value for money and ensuring satisfaction of construction clients. The study adopted quantitative research approach and a survey questionnaire was employed as an instrument of collecting data from relevant construction professionals with adequate knowledge and experience of the construction industry and project management tools. The study was limited to Gauteng and Mpumalanga Provinces in South Africa The survey revealed that application of value management or value engineering, reliable feasibility study, usage of computerized integrated software, application of life cycle costing and utilization of emerging technology and development are the five important project management tools for effective project delivery. It can be concluded that client satisfaction can be achieved by the application and full usage of aforementioned project management tools during the preconstruction, construction and post-construction stages of infrastructural projects.

Utilization of Project Management Tools for Construction Project Success

The construction industry is one that aims for perfection in terms of delivery at the end of the service rendered. Over the years, the Hong Kong construction industry is still trying to make the implementation of value management (VM) generally accepted by construction professionals. This research begins with the introduction of the subject as well as its history. It then further brings into the discussion who can initiate VM study into construction. The projects carried out using VM practice are also discussed, along with their preparations at every stage of construction. Criteria for conducting VM, key success factors for VM implementation, benefits of implementing VM and the functional roles of the Hong Kong Institute of Value Management concludes the other sections of this research. It is concluded that necessary measures should be made to make VM implementation more rampant in the Hong Kong construction industry. 

Value Management in Hong Kong

Due to various problems and challenges of construction industry especially in the production and delivery of sustainable infrastructure, performance of construction projects has become an issue of concern not only to contractors and professionals but other stakeholders including clients, project sponsors and end-users. This is due to complexity of construction process, innovation in the use of raw materials and machinery, new construction management techniques and more importantly, change in the demand of clients. Thus, this research evaluates performance indicators for construction projects from the perspective of consultants and contractors. This is to improve construction project performance with a view to enhancing the quest of construction industry of contributing positively to the economy and overall growth of the nation. Using quantitative approach, data were collected through close-ended questionnaires administered on a group of learned consultants and contractors with sufficient knowledge and experience of the construction industry. From the analysed data, there is a significant difference in the perceptions of consultants and contractors regarding factors affecting performance of construction projects. To consultants, general time factors and conformance to specification are the most important performance indicator for project success while from contractors’ view, cost factors including delay in payment from owner to contractor is a major critical success factor. The two groups unilaterally agreed that bringing about the best planning and scheduling technique before and during construction would assist in improving performance of construction projects in the country.

Perception of Consultants and Contractors to Performance Factors of Construction Projects

Existing literature has shown that Virtual Reality (VR) is widely utilized in advanced economies to enhance sustainable construction practices. However, its adoption in developing economies remains limited. To this end, this study aims at exploring the potential benefits of implementing VR technology in a developing country. The study collected information on the beneficial aspects of VR from previous research and conducted questionnaire surveys to gather relevant insights from construction project experts in Nigeria. The collected data were analyzed using the Measurement of Alternatives and Ranking According to the Compromise Solution (MARCOS) method and Exploratory Factor Analysis (EFA). The MARCOS method revealed that the key potential benefits of VR include improved communication and collaboration, enhanced project performance, risk identification, digitalization, and safety planning. Furthermore, the study conducted an in-depth investigation of the beneficial areas of VR using EFA, which identified six component groups: pre-contract stage planning, post-contract stage planning, quality control and sustainability, design flexibility and reputation, resource management, and risk management and digitalization. The study provides a comprehensive discussion of the advantages of implementing virtual building methods in developing countries.

https://www.mdpi.com/2075-5309/13/7/1665/pdf?version=1688025064

Ayodeji Emmanuel Oke

Papers

Measures of Sustainable Construction Projects Performance

Utilization of Project Management Tools for Construction Project Success

Value Management in Hong Kong

Perception of Consultants and Contractors to Performance Factors of Construction Projects

Exploring the Benefits of Virtual Reality Adoption for Successful Construction in a Developing Economy