Technical Sessions – Monday July 11

2 - Stability of Network DEA
Necmi Avkiran, UQ Business School, The University of
Queensland, St Lucia Campus, 4072, Brisbane, Queensland,
Australia, n.avkiran@uq.edu.au
Users of network DEA (NDEA) presume efficiency estimates to be robust.
Findings indicate (a) removing a relevant input improves discrimination (b)
introducing an extraneous input leads to a moderate loss of discrimination (c)
simultaneously adjusting data shows a mostly stable NDEA (d) swapping divisional
weights produces a substantial drop in discrimination (e) stacking perturbations
has the greatest impact on efficiency estimates with substantial loss
of discrimination, and (f) layering suggests that the core inefficient cohort is
resilient against omission of benchmark branches.
3 - A Computational Analysis of the Impact of Correlation
in DEA
Francisco Lopez, School of Business, Macon State College, 100
College Station, 31206, Macon, GA, United States,
francisco.lopez@maconstate.edu, Johnny Ho, Alex Ruiz-Torres
Two recent articles discuss especial types of linear relations (perfect correlation)
among DEA attributes and how they may affect the DEA scores. These
perfect correlations may have a very different impact on the DEA scores. In
the case of one of these linear relations, removing one of the DEA attributes
does not change the efficiency score of any DMU. The presence of another
type of linear relation makes all the DMUs efficient. This research project aims
at conducting an extensive computational analysis to understand the effect on
the DEA efficiency scores of correlation among attributes.
4 - A DEA Approach in Supplier Selection Taking into Account
Transportation and Inventory costs
Stella Sofianopoulou, Industrial Management & Technology,
University of Piraeus, 80 Karaoli & Dimitriou street, 18534,
Piraeus, Greece, sofianop@unipi.gr
Most studies related to the supplier selection problem consider several selection
criteria but little attention is given to transportation and inventory costs.
In this paper, a two-phase approach for the supplier selection problem is proposed.
First, the sum of transportation and inventory costs for each supplier
is determined by employing genetic algorithms. Second, a DEA approach is
adopted to evaluate performance of suppliers based on multiple criteria including
transportation and inventory costs and at the same time suggest negotiation
strategies for inefficient suppliers.
� MB-19
Monday, 14:00-15:30
Meeting Room 216
Projects & Cases - Getting Students
Involved
Stream: Education and Operations Research
Invited session
Chair: Susan Martonosi, Mathematics Dept., Harvey Mudd College,
301 Platt Blvd., 91711, Claremont, CA, United States,
martonosi@math.hmc.edu
1 - A Case-Based Approach for Teaching Management Science
and Project Management
Bert De Reyck, Management Science & Operations, London
Business School, Regent’s Park, NW1 4SA, London, United
Kingdom, bdereyck@london.edu
I will give an overview of how cases are used in my Project Management and
Management Science courses at London Business School and University College
London. In my opinion, the use of cases is essential for making a course
interesting and relevant, but cases can be of different types, and used in different
ways. I will describe how I develop and use cases in the classroom with
MBA and MSc students, and contrast it with other approaches.
2 - Experiences on Cooperative Learning in OR courses
Marcela Gonzalez, Departamento de Modelación y Gestión
Industrial, Universidad de Talca, Merced 437, s/n, Curicó,
Región del Maule, Chile, mgonzalez@utalca.cl
The experience acquired in the last three years on cooperative learning in OR
courses is presented. Some cooperative learning methods applied for helping
students to work in groups and to solve OR problems are shown.
IFORS 2011 - Melbourne MB-21
3 - Senior Capstone Projects: A Taste of the Real World
Susan Martonosi, Mathematics Dept., Harvey Mudd College,
301 Platt Blvd., 91711, Claremont, CA, United States,
martonosi@math.hmc.edu
A senior capstone is a project conducted during a student’s final year, whose
intention is to synthesize the material they have learned in their courses. At
Harvey Mudd College, mathematics students can choose a traditional thesis
project or a "clinic" project. Clinics are industry-sponsored projects in which
a team of students works on a real-world problem of interest to the sponsoring
organization. This talk will present an overview of the clinic model and discuss
its educational benefits and shortcomings.
� MB-20
Monday, 14:00-15:30
Meeting Room 217
Soft OR II
Stream: Soft OR and Problem Structuring
Invited session
Chair: Vicky Mabin, Victoria Management School, Victoria
University of Wellington, PO Box 600, 6140, Wellington, New
Zealand, vicky.mabin@vuw.ac.nz
1 - PSM Approach: Some Applications
Arabinda Tripathy, Vinod Gupta School of Management, Indian
Institute of Technology, 721302, Kharagpur, West Bengal, India,
tripathy44@rediffmail.com
Problem Structuring Methods approach has been applied in various situations
to address complex societal problems and such other issues and to manage
them. Some of the areas where the concepts of problem structuring methods
have been used are presented here. These relate to issues related to elected representatives,
workers, performance management of academic institutes and the
like. The approach and the outcomes are presented.
2 - Improving Service Delivery in a UK Police Force: Designing
Control Processes using VSM and SSM
Chris Smith, OIM Group, Aston University, Aston Business
School, Aston Triangle, B4 7ET, Birmingham, West Midlands,
United Kingdom, smithcm2@aston.ac.uk
This presentation describes use of Viable System Modeling (VSM) and Soft
Systems Methodology (SSM) to develop a control process for a new customer
contact strategy in a UK police force. Spending cuts in the UK are driving
a UK Police Force to restructure their customer contact, moving away from a
costly front office network to partnering with local councils in One Stop Shops.
Through using VSM and SSM to design the control processes for a new system
a control process has been designed that is both viable while taking into
account the different perspectives of actors who work within the system.
3 - Elder Care Decisions: A Multi-methodological Approach
Vicky Mabin, Victoria Management School, Victoria University
of Wellington, PO Box 600, 6140, Wellington, New Zealand,
vicky.mabin@vuw.ac.nz, Kim Sommer, Gemma Clark
The need for families to confront decisions relating to care of the elderly
are becoming increasingly common with the aging population. This paper
will draw on two different real-life cases, and demonstrate how different approaches
taken from Soft Systems Methodology, Theory of Constraints and
Multi-criteria decision making can be used in multi-methodological fashion
tackle the many facets of how best to care for one’s elder folk. Each method is
able to complement the other to provide a more complete view.
� MB-21
Monday, 14:00-15:30
Meeting Room 218
OR in Forestry
Stream: Forestry Applications
Invited session
Chair: Andrés Weintraub, University of Chile, Santiago, Chile,
aweintra@dii.uchile.cl
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