[PDF] ALIO Back Matter

MD08
2 - Lot Sizing and Pricing Optimization: A Single Period Capacity
Allocation Heuristic
Rosa G. Gonzalez-Ramirez, Postdoctoral-Researcher, Pontificia
Universidad Católica de Valparaíso, Av. Brasil 224, Valparaiso,
2362807, Chile, rosa.gonzalez@ucv.cl, Neale R. Smith,
Ronald G. Askin
We study a profit maximization capacitated lot-sizing problem in which prices and
inventory decisions are coordinated for a multi-product and multi-period model. We
propose a single period capacity allocation heuristic based on lagrangian relaxation.
The procedure attempts to produce the uncapacitated profit maximizing quantity for
each item and period assuming that all production is used to meet demand in that
period. Numerical results are shown in comparison to CPLEX results.
3 - Planning Production, Paper Buying, and Sales at an Integrated
Corrugated Box Company
Rodrigo González, Braier & Asociados Consultores, Caseros 2040,
Olivos, BA, 1636, Argentina, rgonzalez@papyro.com,
Javier Marenco, Gustavo Braier, Andrés Schechtel, Esteban Boada
We address the problem of optimizing paper buying and selling decisions at a
corrugated box company in Argentina, consisting of two paper mills and three
corrugated box facilities. The key decisions are when and what to buy in order to
keep an uninterrupted supply of raw materials for the production process, in such a
way that certain quality and productive constraints are met and the overall income
is maximized. A linear programming-based approach allowed us to succesfully
tackle this problem.
4 - A Reusability Evaluation Method for Reverse Logistics
Shahin K-Sabour, MASc Candidate, Ryerson University,
350 Victoria St., Toronto, M5B 2K3, Canada, skouchek@ryerson.ca,
Kouroush Jenab
Reuse strategy has become increasingly important because it forms holistic model
toward sustainable manufacturing and remanufacturing systems. In this study,
reliability based model for evaluating the reusability of the used items is proposed.
Considering warranty cost and reliability of the returns, the model optimizes the
inventory control for both manufacturing and remanufacturing systems. By
simulating make to order with recovery policy in Arena, the application of the
model is presented.
5 - Technology Transfer with Lean Production
Robert N. Mefford, Visiting Professor, Haas School of Business,
University of California-Berkeley, Berkeley, CA, 94720,
United States of America, mefford@haas.berkeley.edu
Lean production methods have the potential to transfer technology more effectively
throughout a supply chain. This results from the emphasis on “soft technology” and
development of human resources which foster a deeper and more lasting form of
transference. Cases are examined of successful technology transfer via lean
production methods in developing countries.
■ MD08
Aula 355- Third Floor
Decision Analysis II
Contributed Session
Chair: Mischel Carmen Belderrain, ITA, Praça Marechal Eduardo Gomes,
50 - Vila, São José dos Campos, 12.228-900, Brazil, carmen@ita.br
1 - Application of Time Series: Quantitative Analysis of Projection of
the University Students in Lima
Ortega Muñoz, Universidad Nacional Mayor de San Marcos,
Av. Venezuela s/n, Lima, 039, Peru, cortega_m99@hotmail.com
The aim of this work is the projection of the number of students enrolled by 2010-I
in order to serve as technical reference date instrument institutional decisionmaking
in relation to the trend over time in regard to increased number of teachers,
classrooms, computer lab, among others, as well as improving the administrative
and logistical implementation, in order to optimize the service quality of the
university community.
2 - Accelerated Test Data Analysis
Nasser Fard, Associate Professor, Northeastern University,
317 Snell Engineering, Boston, MA, 02115, United States of
America, n.fard@neu.edu
In an ALT data analysis, the pdf of time to failure at normal use conditions is
developed and a life-stress relationship is set. This requires a model to relate the pdf
under step-stress to the pdf under constant stress. A Simple Step Stress Accelerated
Life Test Plan is developed. Where units are initially placed on lower stress S1 until
a hold time, when the stress is increased to S2 and the test is continued until all
units fail or until a predetermined censoring time T.
ALIO / INFORMS International – 2010
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3 - Staggering of Projects with Restriction of Resources: A Case Study
in the Sector of Oil and Gas
Rubiao Gomes Torres Júnior, Msc, Intertechma/Ibmec-RJ, Rua
Moura Brasil 74- 801 Laranjeiras, Rio de Janeiro, 22231200, Brazil,
rubtor@attglobal.net, Guilherme Azevedo, Camila Torres
This study aims to develop a tool to assist the project managements on decision
process and, therefore, proposes a method to solve project scheduling problems with
resource constraints. A heuristic is developed to minimize the duration of the
project through a genetic algorithm. An integer programming method is also
proposed and used to validate the heuristics’ results.
4 - A Control Chart Based on Sample Means and Sample Ranges for
Monitoring Bivariate Processes
Antonio Costa, Professor, UNESP, Av. A. Pereira da Cunha 333,
Guaratinguetá, SP, 12516410, Brazil, fbranco@feg.unesp.br,
Marcela Machado
We propose a single chart based on the synthetic procedure for monitoring the
mean vector and the covariance matrix of bivariate processes, named as the
synthetic MRMAX chart. The sample points correspond to the maximum among
four values: the standardized sample means and sample ranges of two quality
characteristics. The main reason to propose the MRMAX chart lies on the fact that it
is easier to deal with it and, faster in signaling, if compared with the joint T2 and |S|
charts.
5 - SCA Method Applied to Small Family-owned Firm
Mischel Carmen Belderrain, ITA, Praça Marechal Eduardo Gomes,
50 - Vila, São José dos Campos, 12.228-900, Brazil, carmen@ita.br,
Guilherme Major
Strategic Choice Approach (SCA) is applied to the problem of defining future
guidelines of a small family-owned firm. Problem structuring methods (PMSs) and a
detailed description of the SCA are also presented. The results showed that the SCA
is easy to apply and able to deal with uncertainty, even in complex problems,
contributing to the decision group process.
■ MD09
Aula 356- Third Floor
Simulation I
Contributed Session
Chair: Johanna Trujillo Díaz, Engineer, Colombia Catholic University,
Av. Caracas 46-72, Bogoto D.C., Colombia, trujillojohanna@gmail.com
1 - Simulation of a Supply Chain of Manufacture of Sportswear
Gloria Peña, Professor, Universidad Nacional de Colombia, Cra 80
65-223, Bloque M8B Facultad de Minas, Medellín, AN, 050034,
Colombia, gepena@unal.edu.co, Sergio Ramíez, Mauricio Pineda,
Luis Moreno, Javier Díaz
The paper presents a model of a supply chain of an enterprise of the city of
Medellín, which is dedicated to the manufacture, distribution and marketing of
sports clothing. The chain consists of the following links: supply of raw materials,
plant domestic production, plant production satellites, distribution center, stores,
and customers. There is a study on the management of the learning curve in the
clothing sector, and the simulation of the chain is made with the Ithink software.
2 - Design of Multiple Toll Cabins and Productivity Estimation with a
Discrete Event Simulation Model
Iván Vilaboa, Geogestión SA, Padilla 972, Buenos Aires, Argentina,
ivilaboa@gmail.com, Roberto P. Castillo, Mario Rapisardi
Autopistas del Sol, concessionaire of the north freeways access to Buenos Aires City
developed a toll cabin that allows taking care of two cars simultaneously to improve
the productivity and reduce the delay time. Previous to the construction, a
simulation model was done to evaluate the productivity with different design
alternatives. Modeling the system allow improvements for a more agile transit in
better security conditions. The foretold results fit very well with the real operation
values.
3 - Improvements in the Level of Attention to the Clients of a
Commercial Bank
Luis Clemente, Pontificia Universidad Católica del Perú,
Av. Universitaria 1801, San Miguel, L32, Peru,
lclemente@pucp.edu.pe, Miguel Mejía
In this article the performance of the bank agency personnel’s that assists in counter
to the clients is evaluated. Three client types were identified. A simulation model is
used to evaluate the impact of the queues system management that uses the bank
on determined management indicators. It was possible to improve the counter
personnel’s performance changing the times and priorities of attention without
additional expenses.