Selection of the effective dwelling house walls by applying attributes values determined at intervals

Abstract

The higher life quality standards, the changes of habits and new well‐being requirements have led to an increase in the demand for housing. Decision‐making problems in construction management often involve a complex decision‐making process in which multiple requirements and conditions have to be taken into consideration simultaneously. However, not every attribute used in multidimensional scaling is equally and precisely weighted in the real world. Thus quantitative and qualitative assessments are often required to deal with uncertainty, subjective and imprecise data. The accuracy of performance measures in common multi‐attribute methods is usually assumed to be accurate. Grey theory is a new technique for performing prediction, relational analysis and decision‐making in many areas. This paper considers the application of grey relations methodology for defining the utility of an alternative and is proposed as a method of multiple criteria COmplex PRoportional Assessment of alternatives with Grey relations (COPRAS‐G). In this model parameters of the alternatives are determined by the grey relational grade and are expressed in intervals. A case study of assessing external walls of four alternatives was used to demonstrate the applicability and the effectiveness of the proposed approach. The results show that this method can be implemented as an effective decision aid in multi‐attribute selection.

Santrauka

Straipsnio tikslas ‐ pasiūlyti alternatyvia daugelio rodikliu vertinimo metodika. Šios metodikos išskirtinumas ‐ rodikliu reikšmes, aprašomos intervalais. Tai labiau atitinka realias aplinkos salygas ir galimas reikšmes. Modelis su intervaluose pateiktomis efektyvumo rodikliu reikšmemis pritaikytas E. K. Zavadsko ir A. Kaklausko sukurtam metodui COPRAS (Complex Proportional Evaluation). Taip gautas naujas metodas COPRAS‐G. Šis metodas pritaikytas daugiabučiu namu išoriniu sienu efektyvumo vertinimo uždaviniui spresti. Sudaryta efektyvumo rodikliu sistema, nustatyta efektyvumo rodikliu reikšme, rodikliu rangas. Pagal sudaryta modeli pritaike COPRAS‐G metoda, galime spresti daugeli statybos, vadybos alternatyvu vertinimo uždaviniu.

Keywords:

• walls
• alternatives
• multi‐attribute
• selection
• COPRAS
• COPRAS‐G
• grey number

Reikšminiai žodžiai::

• sienos
• alternatyvos
• daugiatikslis parinkimas
• vertinimas
• COPRAS
• COPRAS‐G
• pilkieji skaičiai