Journal: Investigao Operacional

Found 215 papers in total
Valuing the acquisition of an information technology asset through the least squares Monte Carlo method
Valuing the acquisition of an information technology asset through the least squares Monte Carlo method
2006,
In this article, a project based on the acquisition of an information technology asset...
Statistical inference of efficiency estimators obtained with the DEA non parametric frontier technique. A bootstrap methodology
Statistical inference of efficiency estimators obtained with the DEA non parametric frontier technique. A bootstrap methodology
2006,
The efficiency measurement of decision making units is a key-task in contemporary...
Fuzzy DEA frontier in agricultural efficiency evaluation
Fuzzy DEA frontier in agricultural efficiency evaluation
2006,
This paper uses Data Envelopment Analysis (DEA) to measure the efficiency of some...
Considerations about the rankings of High Schools
Considerations about the rankings of High Schools
2006,
The publication of rankings about high schools, started in 2001, had a significant...
An integer programming model for truss topology optimization
An integer programming model for truss topology optimization
2006,
In this paper a truss-structure model is described for finding a kinematically stable...
Applying data warehousing technology to support planning and control on mass transit companies
Applying data warehousing technology to support planning and control on mass transit companies
2006,
This paper describes the methodology used in the construction of a Data Warehousing...
An &Xmacr; chart with variable sample sizes; a new adaptive method
An &Xmacr; chart with variable sample sizes; a new adaptive method
2006,
In the last years a new class of control charts which parameters change during...
An extension of a variant of a predictor–corrector primal–dual method from linear programming to semidefinite programming
An extension of a variant of a predictor–corrector primal–dual method from linear programming to semidefinite programming
2005,
We extend a variant of a predictor–corrector primal–dual method for Linear...
Application of the volume algorithm to the approximate and exact solving of the asymmetric traveling salesman problem
Application of the volume algorithm to the approximate and exact solving of the asymmetric traveling salesman problem
2005,
In this paper we present computational results with the volume algorithm, a variant of...
Upper and lower bounds for non-radial efficiencies in data envelopment analysis: a vector approach
Upper and lower bounds for non-radial efficiencies in data envelopment analysis: a vector approach
2005,
This paper presents a new approach to evaluate non-radial DEA efficiencies. This...
The art and science of problem solving
The art and science of problem solving
2005,
In this paper we will document that real-life problem solving in complex situations...
Recovery logistics management in Portugal
Recovery logistics management in Portugal
2005,
Following the communitarian politics, Portugal has to implement wasted management...
Turning machine statica evaluation using methods for ranking improvement of DEA models
Turning machine statica evaluation using methods for ranking improvement of DEA models
2005,
In this paper we present turning machine study with the use of Data Envelopment...
A model and a heuristic for the primary health care coverage planning problem in Portugal – application to ‘Cova da Beira’ case
A model and a heuristic for the primary health care coverage planning problem in Portugal – application to ‘Cova da Beira’ case
2005,
This communication presents an attempt in order to help on the Planning of a Primary...
Creativity for operational researchers
Creativity for operational researchers
2005,
This paper presents some modern and interdisciplinary concepts about creativity and...
Using optimization to solve truss topology design problems
Using optimization to solve truss topology design problems
2005,
The design of truss structures is an important engineering activity which has...
Automatic generation of simulation models of an auto-radio production line
Automatic generation of simulation models of an auto-radio production line
2005,
This paper reports the development of a computer application to support the decision...
Traffic simulation of signal controlled intersections
Traffic simulation of signal controlled intersections
2005,
The installation of traffic lights at street intersections is a common practice in...
An improved lower bound for the asymmetric traveling salesman problem based on the assignment problem
An improved lower bound for the asymmetric traveling salesman problem based on the assignment problem
2005,
In this article we describe how to compute a lower bound for the asymmetric traveling...
Fuzzy DEA (data envelopment analysis) frontiers
Fuzzy DEA (data envelopment analysis) frontiers
2005,
The “fuzzy” DEA frontier is applied in situations where some variables...
“Mixture of local experts” model for data classification
“Mixture of local experts” model for data classification
2005,
In this paper we present a Mixture of Local Experts Model (MLEM) for data...
Reliability assessment of non-Markovian complex production systems using a hierarchical approach
Reliability assessment of non-Markovian complex production systems using a hierarchical approach
2004,
In the actual context of global, intense competitiveness, the performance of the...
Scheduling variable processing time operations in systems with buffers
Scheduling variable processing time operations in systems with buffers
2004,
In this work a scheduling operation problem with variable processing times is...
Heuristic sensitivity analysis for baker's yeast model parameters
Heuristic sensitivity analysis for baker's yeast model parameters
2004,
Baker's yeast, essentially composed by living cells of Saccharomyces cerevisiae , used...
Papers per page: