in the science of operation research and decision theory, selection is the most important process. selection is a process that studies multiple qualitative and quantitative criteria, related to the science of management, which are mostly incompatible with each other. the multi criteria selection of a renewable energy portfolio is one of the main issues considered in multi criteria literature. i...

this paper proposes a family of robust counterpart for uncertain linear programs (lp) which is obtained for a general definition of the uncertainty region. the relationship between uncertainty sets using norm bod-ies and their corresponding robust counterparts defined by dual norms is presented. those properties lead us to characterize primal and dual robust counterparts. the researchers show t...

The students of the university of teacher education St.Gallen (PHSG, Switzerland) document aspects of their learning process affiliated with their first experiences in a practical training class during their first academic year linked with an E-Portfolio (Weblog). The first presented study reports findings (n= 129; questionnaire; Man Withney UTests; Wilcoxon Signed Rank Tests) concerning the at...

Practically all firms pursue goals by selecting a portfolio of courses of action that consume resources. Yet, due to uncertainties such as unforeseen market developments, it may not be possible to know in advance how much value these actions yield. Thus, the selection must be based on uncertain ex ante estimates about the future values of the actions. In this paper we show that the explicit Bay...

This paper presents a new methodology combining multiple criteria sorting or ranking methods with project portfolio selection procedure. The multicriteria method permits the comparison of projects in terms their priority based on qualitative and quantitative criteria. Then, feasible set projects, i.e. portfolio, is selected according to defined by satisfying resources logical constraints. propo...