Table 2

DEA methods with strength and weakness

DEA method
Conventional DEACross efficiency DEASuper efficiency DEA
Strength(1)Can separate efficient DMUs from DMUs to be evaluated

(1)Can use cross efficiency score (CES) as a relative evaluation between any pair of DMUs

(2)

Can provide a full ranking for the DMUs to be evaluated

(1)Can more accurately reflect differences among efficient DMUs than simple efficiency
Weakness

(1)Poor discriminating power by rating frequently too many efficient DMUs

(2)

All efficient DMUs are treated equally in terms of efficiency

(1)Non-uniqueness of CES.

(2)Can't generate consistent rankings for DMUs with many inputs and many outputs

(1)Can't use super efficiency score (SES) as a relative evaluation between any pair of DMUs
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