CONTENT

Editorial

1. Antonis Panas, John-Paris Pantouvakis:
Multi-attribute regression analysis for concrete pavement productivity estimation

2.Helena Ellingerová:
Planning And Management Of Construction Budgetary Costs

3. Milorad Jovanovski, Valentina Žileska Pancovska, Igor Peshevski:
ERMR System – an useful tool indefining of technology for
excavation

4. Fapohunda, J. A., Omoniyi, S. S:
Enhancement of Site Managers Efficiency towards Accomplishments Of Project Objectives

5. Jesús Mtnez-Almela, Ignacio de los Rios:
Training Project Management Complexity In Postgraduate And Continuing Education Programs: A Learning Strategy In The Eshe (European Space Of Higher Education) Framework

6. Ayman Ahmed Ezzat Othman:
Improving Building Performance Through Integrating Constructability in the Design Process

7. Milan Porhincák, Adriana Eštoková:
Environmental profile of building Materials of a single family house

1. Antonis Panas, John-Paris Pantouvakis:

Multi-attribute regression analysis for concrete Pavement productivity estimation

Abstract:
The estimation of concrete pavement productivity is intricate because of several factors, such as the available working width and length, the concrete layer thickness, the construction methodology, automation capabilities and the working conditions. This study intends to assess the productivity of the concrete pavement operations by taking into consideration the e¦ect of the above factors using the regression analysis technique. In regression models, one dependent variable (productivity) is considered against several independent variables (width, length, working conditions, health & safety level). Direct observation, site visits and video recording of actual concrete pavement activities on a construction site over a period of four months has been used for data collection. The regression relationships are plotted, so as to derive empirical nomographs and correction coefficients which can be used to adjust actual productivity against theoretical baselines. In this sense, process-oriented estimation methodologies for specific construction operations can be developed, by which each factor’s contribution to productivity can be estimated. The results indicate that a larger working area increases productivity for a given concrete layer thickness. The estimated correction factors fit the actual measurements in a statistically significant fashion, however their predictive capability is expected to improve as the study sample increases.

Keywords:
Concrete paving, Cost, Model, Productivity, Regression

2. Helena Ellingerová:

Planning and Management of Construction Budgetary Costs

Abstract:
The intention of every investitor is to obtain construction work in the most effective and economic manner. In other words the investor is trying to achieve the highest value for money for his capital investment. This goal can be achieved by systematic management of the investments throughout the planning process, design and construction phases of a project until the final account is paid and permission granted for use of the building. In order to achieve this, it is necessary to estimate the development cost during the planning and design phase and control or manage this cost throughout the project. The cost management process and the selection of a contractor are important factors for investor to achieve this goal.

Keywords:
costs management, investment process, life cycle of a building, cost estimate, economic efficiency

3. Milorad Jovanovski, Valentina Žileska Pancovska, Igor Peshevski:

ERMR System – an Useful Tool In Defining of Technology for Excavation

Abstract:
The article presents the basis of classification system named as excavation rock mass rating system (ERMR). The purpose for system development comes from the fact that in all civil engineering or minning projects, one of the key problems is to addopt technology of excavation on the characterisstics of natural environment, and to chosse and adequate equipement for excavation. Methodology for establishing of ERMR system is based on ranking and scoring of care¦uly choosen classification parameters. The parameters for classification and the range of parameters in each class is explained briefly. The system is correlated with some known rating rock mass systems. The classification is developed on the bases of numerous investigations for di¦erent civil engineering and mining projects, as well as laboratory testings of rock mass parameters. The case histories used in developing of the ERMR system are noted. For each rock mass class, an adequate technology of excavation is suggested, and the excavation classes are corelated with unit price of excavation in di¦erent media. The practical aplication of ERMR system is undelined.

Keywords:
Classification, excavation, technology of excavation, rock masses, parameters

4. Fapohunda, J. A., Omoniyi, S. S:


Enhancement of Site Managers Efficiency towards Accomplishments of Project Objectives

Abstract:
A construction project could be completed within the budgeted cost; time frame; quality expected, and, even satisfied the stakeholders' implied needs with lots of resources wastage, thus, an accomplishment of the predetermined project objectives do not signify that the project is successful in utilisation of resources optimally. To achieve optimal construction resources utilisation and minimisation of resources wastefulness, in addition to other factors; there is a need to assess how the site manager’s achieve the project concepts in relation to the resources utilisation, which this study evaluated. This research was conducted in the UK and mixed method research approach was adopted by exploring quantitative questionnaire and qualitative interview surveys’ methods for obtaining data. The paper establishes factors that are under accomplished by the site manager and which require improvement towards optimal resources utilisation. Among the facts deduced are the needs for e¦ective management of time and cost saving contrasts; implementation of prefabrication, modular construction systems; and adequate planning before project commences. The findings report in this paper will not only enhance the site managers efficient performance during construction production process, but will also improve resources utilisation and stakeholders’ satisfaction.

Keywords:
Construction production process, Project Concepts, Site Managers Objectives, stakeholders’ satisfaction, Resources Utilisation

5.Jesús Mtnez-Almela, Ignacio de los Rios:


Training Project Management Complexity in Postgraduate And Continuing Education Programs: A Learning Strategy in The Eshe (European Space of Higher Education) Framework

Abstract:
The objective of this paper is to address the methodological process of a teaching strategy for trainig project management complexity in postgraduate programs. The proposal is made up of different methods —intuitive, comparative, deductive, case study, problem-solving Project-Based Learning— and different activities inside and outside the classroom. This integration of methods motivated the current use of the concept of “learning strategy”. The strategy has two phases: firstly, the integration of the competences —technical, behavioral and contextual—in real projects; and secondly, the learning activity was oriented in upper level of knowledge, the evaluating the complexity for projects management in real situations. Both the competences in the learning strategy and the Project Complexity Evaluation are based on the ICB of IPMA. The learning strategy is applied in an international Postgraduate Program —Erasmus Mundus Master of Science— with the participation of five Universities of the European Union. This master program is fruit of a cooperative experience from one Educative Innovation Group of the UPM -GIE-Project-, two Research Groups of the UPM and the collaboration with other external agents to the university. Some reflections on the experience and the main success factors in the learning strategy were presented in the paper.

Keywords:
Project Management, Complexity, evaluation models, Project–Based Learning, competence, engineering higher
education

6.Ayman Ahmed Ezzat Othman:


Improving Building Performance through Integrating Constructability in the Design Process

Abstract:
The traditional procurement approaches commonly adopted in construction projects and the involvement of multitude of various project participants with diverse objectives, skills and interests tended to separate design from conbstruction.. This separation obstructs contractors from providing designers with construction feedback and suggestions for design improvement, which ultimately hampers the improvement of building performance. Because of the importance of the design phase and the vital role played by contractors in the construction industry, this paper aims to investigate the integration of construction knowledge and contractor’s experience in the design process as an approach for improving building performance. In order to achieve this aim, a research methodology is designed to accomplish four objectives. Firstly, reviewing the nature of the construction industry; constructability; architecture and the design process and measuring building performance. Secondly, presenting case studies of successful projects benefited from applying the concept of constructability during the design process. Thirdly, developing an innovative framework to facilitate the integration of construction knowledge and contractor’s experience in the design process and establishing the strategies that support its application. Finally, summarising research conclusions and recommendations useful to construction professionals and further research. Findings of the research showed that integrating the concept of constructability during the design process improves building performance (e.g. reducing construction time, cost and waste as well as improving quality and productivity) and enhances the relationships between project participants. The research adds a valuable contribution to the built environment body of knowledge through presenting a practical approach for integrating construction knowledge and contractor’s experience in the design process.

Keywords:
Constructability, design management, design process, partnering, performance, quality.

7.Milan Porhincák, Adriana Eštoková:

Environmental Profile of Building Materials of a Single Family House

Abstract:

A term sustainable is widely used in every branch of human activity, including ivil engineering. Exploitation of raw materials and natural resources, consuming of energy from non-renewable sources, air, water and soil pollution or creation of massive amounts of waste belong to serious issues of society. Each building process, including extraction of raw material, transportation, production of components, build-up, operation or demolition of buildings poses the negative environment impacts. Besides buildings operation, which is the most energy demanding phase of the life cycle and the phase with the majority of greenhouse and acidifying gasses emissions, selection of material basis is very important. Production of many materials is very non-ecological and requires huge amounts of energy, usually derived from fossil fuels. In this paper materials of a single-family house were analyzed from environmental point of view on the basis of life cycle assessment. Parameters such as amount of used material, global warming potential, acidification potential and primary energy intensity were evaluated. On first occasion the negative influence of build-up was analyzed and the environmental profile of building was created. In the assessed building, amount of primary energy intensity reached 441394.3 MJ, amount of CO2 emissions reached 34953.6 kg CO2eq and SO2 emissions reached 129.9 kg SO2eq. Subsequently, important actions, such as optimization of material base and constructional design should follow to improve the environmental profile of building in terms of used building materials.

Keywords:
Building materials, environmental assessment, energy consumption, global
warming, acidification