Research Article

A Fuzzy Nonlinear Programming Approach for Optimizing the Performance of a Four-Objective Fluctuation Smoothing Rule in a Wafer Fabrication Factory

Table 8

Results of the Wilcoxon sign-rank test.

  
(the average cycle time)
  
(the maximum lateness)
  
(cycle time standard deviation)
  
(the number of tardy jobs)

FIFO2.02**2.02**1.210.54
EDD2.02**1.211.75*1.21
SRPT2.02**2.02**1.75*0.67
CR2.02**1.75*1.481.21
FSMCT2.02**1.481.75*1.21
FSVCT2.02**2.02**2.02**0.54
NFS2.02**2.02**0.541.21
4o-SDR2.02**−0.080.340.76

P < 0.05.
** P < 0.025.
*** P < 0.01.