Page 93 - New Trends in Green Construction

SELECTION OF CRITERIA FOR THE GREEN ROOF DECISION SUPPORT SYSTEM
Andrius Gulbinas, Daiva Makutėnienė, Airida Tylienė
Keywords: Criteria for green roof selection, Green roof, Decision support system, expert systems 1. Introduction
A green roof system is an extension of the roof which involves high quality water-proofing, root repellent system, drainage system, filter cloth, a lightweight growing medium, and plants. Roof is very important part of house and few ways are possible for renovation – to construct gable roofs with additional living space, recovering of constructions, and more possibilities – to make green roof. Because of green roof construction processes have many attributes, actors and criteria, Decision Support Systems (DSS) can be considered as one of the potential information technologies that can be applied to enhance the quality of design decisions.
2. Decision Support Systems for green roofing
The construction of green roof is complex. DSS can provide a list of well-proven construction companies, as well as contentious and problematic situations analysis, as well as construction drawings, costs etc. The goal of this article is to define the main criteria for the future DSS for green roofing.
The DSS also has the potential to be constructed as a system platform for implementing building information contained in BIM models, associated with other databases, analytical models, and expert knowledge. Green roof subject can have place in BIM, too. This article explores an opportunity to extend green roof design processes toward the decision support and artificial intelligence domains by applying the theories and principles of DSS. This research is the first step toward the development of web-based DSS for green roofing system selection.
Before examining the mechanism of the decision-making for green roofing system selection and defining main criteria, authors present briefly look at the typical assembly and generic classification of green roof systems. Contemporary vegetated roofing is frequently divided into two generic categories: extensive and intensive, based on virtue of the depth of its growing medium (Charoenvisal, 2013).
Defining the main criteria for upcoming DSS for green roofing is based on decision-making framework developed by Elizabeth J. Grant from her dissertation paper, A Decision-Making Framework for Vegetated Roofing System Selection (Grant, 2007). The framework was developed to help designers determine the most feasible green roof system for a particular project based on a summation of total importance of the advantages represented by each design alternative.
According to Suhr, the paramount advantage can be defined by the Defender-Challenger process (Suhr, 1999). The process starts with selecting one of the advantages as the initial defender and selecting another advantage as the initial challenger. After the paramount advantage is defined, the decision maker can begin to weigh the importance of each most important advantage, compared directly or indirectly with the paramount advantage based on the similar scale-of- importance, ranging from 0 to 100. After the crossover point is identified, the numeric scores of
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New Trends in Green Construction