Research Article

Estimation of Congestion in Free Disposal Hull Models Using Data Envelopment Analysis

Table 6

Comparison results of congestion treatment in BCC and FDH technologies in Example 3.

DMU = year
in FDH

in BCC
Results of the proposed
approach in
Results of Cooper et al.’s
approach in [6]

= 1981 (0, 0)(0, 0)No congestion No congestion
= 1982(0, 0)(0, 0.72)Congestion No congestion
= 1983(0, 0)(0, 0)No congestion No congestion
= 1984(0, 0)(0, 0)No congestion No congestion
(0, 0)(0, 0)No congestion No congestion
= 1986 (0, 0)(0, 0)No congestion No congestion
= 1987(0, 0)(0, 0)No congestion No congestion
= 1988(81.30, 0.67)(65.39, 0)Congestion Congestion
= 1989(45.00, 0.52)(45.00, 0)Congestion Congestion
= 1990 (2.00, 0.74) (43.16, 0)Congestion Congestion
= 1991 (0, 0)(0, 0)No congestion No congestion
= 1992(0, 0)(30.72, 0) No congestionCongestion
= 1993 (0, 0)(1.79, 0)No congestionCongestion
= 1994 (0, 0)(0, 0)No congestion No congestion
= 1995(7.70, 4.33)(0, 3.98)Congestion Congestion
= 1996(0, 0)(0, 0)No congestion No congestion
= 1997(0, 0)(0, 0)No congestion No congestion