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Publications

Publications by Ana Camanho

2011

BESP - benchmarking of Portuguese secondary schools

Authors
Portela, MCAS; Camanho, AS; Borges, DN;

Publication
Benchmarking

Abstract
Purpose: The purpose of this paper is to illustrate the implementation of a web-based platform integrating benchmarking and data envelopment analysis (DEA) for the Portuguese secondary schools. Design/methodology/approach: The benchmarking platform is designed around a set of key performance indicators that are displayed using benchmarking graphs. These indicators are also aggregated through the methodology of DEA to provide a summary measure of performance. Findings: The benchmarking platform developed enables schools to perform internal and external evaluation through a standard model that is based on indicators of school activities. It encourages schools' efforts of continuous improvement and increases society awareness regarding schools' context and results obtained. Practical implications: The benchmarking platform can be useful for schools and general public. For the general public, there is a tool that allows the construction of user-defined rankings online and benchmarking tools that allow the comparison of performance of a specific school with others. In addition to these features, schools have in the BESP platform a repository of historical data, and the possibility to see a set of graphs that show for some indicators their evolution over time. Originality/value: This paper describes a breakthrough in the Portuguese education context. The BESP platform is the first in this context to combine DEA and benchmarking tools in a web-based environment, designed to enable real-time performance assessments. © Emerald Group Publishing Limited.

2010

Performance Assessment of Construction Companies Integrating Key Performance Indicators and Data Envelopment Analysis

Authors
Horta, IM; Camanho, AS; Da Costa, JM;

Publication
JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT-ASCE

Abstract
The web benchmarking systems broadly used in the construction industry (CI) are designed to provide results based on key performance indicators (KPIs). No insights concerning organization overall performance and improvements targets are available. This research aims to fulfill this gap using data envelopment analysis (DEA) as a method to complement the information provided by a set of KPIs. The methodology proposed is useful to all organizations involved in benchmarking routines. To enable a more realistic assessment of CI companies, two types of DEA models were used, one allows factor weights to vary freely and the other includes weight restrictions. These models assign an efficiency score to each organization, identifying efficient organizations and providing performance improvements targets for the others. To enable suggesting targets for all organizations, expert opinion was used to specify virtual units which were included in the efficiency assessment to define a practical frontier located beyond the productivity levels of the original DEA frontier. Based on a sample of 20 Portuguese leading contractors, the Portuguese web benchmarking system for CI, icBench, was used to demonstrate the advantages of integrating the DEA method with KPIs benchmark scores.

2005

Cost efficiency, production and value-added models in the analysis of bank branch performance

Authors
Camanho, AS; Dyson, RG;

Publication
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY

Abstract
This paper develops a framework for performance appraisal in the context of a bank branch network. A data envelopment analysis model is advocated that can identify both input and output inefficiencies from a cost minimization perspective. The model is then applied to the analysis of a bank branch network and the production and value-added approaches are deployed jointly to give a comprehensive assessment of bank branch efficiency. The sources of underperformance are identified and their managerial implications are explored.

2012

Performance assessment of secondary schools: the snapshot of a country taken by DEA

Authors
Portela, MCS; Camanho, AS; Borges, D;

Publication
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY

Abstract
This paper describes a performance assessment of Portuguese secondary schools using data envelopment analysis (DEA). The assessment adopts a perspective where schools are viewed as promoting students achievement given their characteristics in terms of academic abilities and socio-economic background. Our sample comprised all secondary schools in Portugal with both basic and secondary education levels. Two types of DEA analysis are performed: one using an output-oriented model that restricts output (exam scores) weights to be linked to the number of students that have done that exam in the school, and the other using a model that restricts factor weights to be equal for all schools. In this model the weight restrictions are linked to the total number of exams done nationally. The first model is well suited for identifying worst performing schools and to assess schools that may specialize in certain subjects, whereas the latter is best suited for improving discrimination between best performing schools when pursuing the identification of benchmarks, as well as to construct performance rankings. Journal of the Operational Research Society (2012) 63, 1098-1115. doi: 10.1057/jors.2011.114 Published online 16 November 2011

2010

Analysis of complementary methodologies for the estimation of school value added

Authors
Portela, MCAS; Camanho, AS;

Publication
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY

Abstract
This paper analyses the value added (VA) of a sample of Portuguese schools using two methodologies: data envelopment analysis (DEA) and the methodology used presently by the UK Department for Children, Schools and Families (DCSF). The VA estimates obtained by the two methods are substantially different. This reflects their different focus: DEA emphasizes on best-observed performance, whereas the DCSF method reveals average performance. The main advantage of the methodology used by the DCSF is its simplicity, although it confounds pupil effects with school effects in the estimation of school VA. In contrast, the DEA methodology can differentiate these effects, but the complexity may prevent its use in a systematic way. This paper shows that the two methods provide complementary information regarding the VA of schools, and their joint use can improve the understanding of the relative effectiveness of schools regarding the progress that pupils make between educational stages.

2010

An improvement on the Tracy and Chen model 'A generalized model for weight restrictions in DEA'

Authors
Khalili, M; Camanho, AS; Portela, MCAS; Alirezaee, MR;

Publication
JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY

Abstract
Recently Tracy and Chen presented a parametric DEA model (PDEA) to assess relative efficiency in the presence of a generalized form of linear weight restrictions. This paper proposes a modification to the PDEA model that avoids the need to resort to searching algorithms to estimate efficiency, and assures that the correct efficiency scores are obtained in a single stage using mathematical programming solvers. The results of this model and the results of Tracy and Chen's PDEA model are compared using the examples reported in their paper. The results confirm the superiority of the model proposed in this paper. Journal of the Operational Research Society (2010) 61, 1789-1793. doi:10.1057/jors.2009.140 Published online 16 December 2009

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