Performance Ranking Method Based on Superefficiency with Directional Distance Function in DEA

Table 1

Example data and superefficiency results.

DMU	Original data			Conventional input-oriented SE	N-L SE	New model (11)
	Input		Output
	A	2	4				2	2.5000	2.5000	1.3000
B	8	3	4	0.8132	0.8741	0.8994
C	12	0	6	Infeasible	Infeasible	1.6000
D	8	4	5	0.8500	0.9331	0.9333
E	5	5	5	1.6000	1.2000	1.1500