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In today’s scenario of increasing energy prices, new legislations, and rising consumer concerns regarding environmental issues, industries face an unprecedented challenge of reducing their energy consumption without negatively impacting their profit and productivity. Based on this, companies are focusing on analyzing their energy efficiency, which has various criteria to be considered, and at least three organizational levels. To close this gap, this study developed an Industrial energy efficiency assessment and prioritization model based on energy assessment literature. It utilized multi-criteria analysis for the prioritization of industrial energy efficiency measures. To achieve the goal, a literature review was conducted to map relevant energy efficiency practices from which an industrial energy efficiency assessment tool was developed through the lens of three organizational levels (plant, process, and machine). Subsequently, an energy-efficiency project prioritization tool was proposed using the multi-criteria PROMETHEE II method. The assessment and prioritization model was applied to an energy industry for refinement. It generated an overview of the company's energy efficiency maturity and a ranking of the most recommended measures for the optimal use of energy resources according to established criteria and their weights. Four subcategories (lighting, HVAC systems, compressed air, and motors) were analyzed for the organizational levels, and lighting presented the higher result of a maturity of 2.77 on a scale from 0 to 3, also the maturity of the company was 2.01, which means that is still space for improvement. The improvements were highlighted according to each subcategory studied, pointing to actions that needed to be developed to improve energy efficiency.

RESUMONas últimas décadas, temas relacionados a gestão de serviços tem atraído o interesse tanto de acadêmicos quanto de profissionais. Especificamente, o lean service tem estado em evidência ao se tratar da melhoria da produtividade em empresas de serviços. A organização de dados da produção científica sobre o tema pode contribuir para a continuidade e evolução das investigações. O objetivo desse estudo, portanto, é analisar quantitativamente o que se produziu em relação ao lean service. O trabalho foi realizado envolvendo técnicas bibliométricas, através da consulta às bases ISI Web of Knowledge e Scopus. Para a pesquisa utilizou-se "lean service" como expressão-chave, e sem que se impusesse nenhuma restrição em relação aos anos de publicação, 58 artigos publicados desde 1995 a 2014 constituíram a amostra. Ao final do estudo foram apresentados resultados de estatística descritiva com a identificação dos autores, artigos e periódicos mais referenciados por estudiosos em todo o mundo.Palavras-chave: Lean Service; Lean; Gestão de Serviços. ABSTRACTIn the last decades, issues related to management services has attracted the interest of both academics and professionals. Specifically, the lean service has been in evidence when it comes improving productivity in service companies. The data organization of the scientific production about the subject can contribute to the continuity and progress of the investigations. The aim of this study, therefore, is quantitatively analyze what was produced in relation to lean service. The study was conducted involving bibliometric techniques, by consulting the ISI Web of Knowledge and Scopus databases. For the research we used "lean service" as an expression key, and impose no restrictions on the years of publication, 58 articles published from 1995 to 2014 constituted the sample. At the end of the study were presented descriptive statistics results with the identification of the authors, articles and journals most referenced by scholars worldwide.