In this paper, grey system theory and DEA are combined to establish a grey DEA model. In traditional DEA model, Input and output values of decision-making groups are all real numbers and real variables. They are replaced by grey numbers and grey variables in grey DEA model respectively. Using positioning solution method of grey linear programming, we prove the necessary condition for grey effec...

This paper adopts two mathematical approaches, data envelopment analysis (DEA) and grey relation analysis (GRA) to measure DEA efficiency using the sample of 69 listed US internet companies. A total of 40 indicators were initially selected for the efficiency evaluation, with 21 related to DEA-input indicators and 19 to DEAoutput indicators. Eight representative indicators selected using GRA are...

Nowadays, in competitive environment, a fundamental factor that helps governmental and non-governmental organizations to achieve their goals is attention to efficiency and its continuous improvement, which is only possible through continuous Efficiency Evaluation. Data Envelopment Analysis (DEA) is a suitable method for Efficiency Evaluation in organizations. But one limitation of this method i...

Qualitative input is encountered in many real decision-making domains. Often such domains include tradeoffs among multiple attributes, and estimates of parameters are often expressed with some degree of uncertainty. Grey related analysis has been proposed as a means to use interval fuzzy representation of data. When dealing with multiple criteria data, model parameters that can involve uncertai...

in competitive markets, the operations strategies of companies are normally formulated based on their competitive advantages. an effective operations strategy should maintain and improve competitive advantages based on the capabilities of the corporate operations resources. considering the market requirements and the operational performance of the rivals is the key for success and survival of a...

Self-reported behavioural data, being often linguistic variables that represent a qualitative measure of respondents’ opinions/attitudes, are vague, uncertain, and fuzzy in nature. A road safety performance index, based on these should consider this uncertainty. In study, numbers were used to describe self-reported behaviour Montenegrin roads, which was further integrated into the data envelopm...

DEA Classic models cannot be used for inaccurate and indeterminate data, and it is supposed that the data for all inputs and outputs are accurate and determinate. However, in real life situations uncertainty is more common. This article attempts to get the common weights for Decision-Making Units by developing DEA multi-objective models in the grey environment. First, we compute the privilege o...

At present, bid evaluation in China mainly adopts the method of traditional comprehensive scoring. And the method of analytic hierarchy process or fuzzy synthetic assessment is also in common use. However, those methods have their own weaknesses, e.g., having a strong subjectivity, lacking in analysis of quantitative indicators, and being unable to reflect the defects of the bidders and reasons...