Robert Hermann1Rupert J Baumgartner2Stefan Vorbach3Arne Ragossnig4Roland Pomberger11Montanuniversita...

1. Evaluation and selection of decision-making methods to
assess landfill mining projects
Robert Hermann1
Rupert J Baumgartner2
Stefan Vorbach3
Arne Ragossnig4
Roland Pomberger1
1Montanuniversitaet Leoben, Leoben, Austria
2University of Graz, Graz, Austria
3Graz University of Technology, Graz, Austria
4UTC Umwelttechnik und GeoConsulting ZT GmbH, Vienna, Austria
Robert Hermann, Montanuniversitaet Leoben, 8700 Leoben, Franz Josefstraße 18, Austria. Email:
robert.hermannatunileoben.ac.at
For the first time in Austria, fundamental technological and economic studies on recovering
secondary raw materials from large
landfills have been carried out, based on the 'LAMIS - Landfill Mining Austria' pilot project. A main
focus of the research
- and the subject of this article - was to develop an assessment or decision-making procedure that
allows landfill owners
to thoroughly examine the feasibility of a landfill mining project in advance. Currently there are no
standard procedures
that would sufficiently cover all the multiple-criteria requirements. The basic structure of the
multiple attribute decision
making process was used to narrow down on selection, conceptual design and assessment of
suitable procedures. Along with a
breakdown into preliminary and main assessment, the entire foundation required was created, such
as definitions of requirements
to an assessment method, selection and accurate description of the various assessment criteria and
classification of the target
system for the present 'landfill mining' vs. 'retaining the landfill in after-care' decision-making

2. problem. Based on these
studies, cost-utility analysis and the analytical-hierarchy process were selected from the range of
multiple attribute decision-making
procedures and examined in detail. Overall, both methods have their pros and cons with regard to
their use for assessing landfill
mining projects. Merging these methods or connecting them with single-criteria decision-making
methods (like the net present
value method) may turn out to be reasonable and constitute an appropriate assessment method.