NEH.m

代码说明：

  1.NEH principle (1) the processing time of each workpiece on all machines is summed; the summed values are sorted from large to small; (2) first select the first workpiece (the longest processing time), with the second workpiece into the first workpiece before and after the two positions, calculate makespan, small is saved; (3) fix the sequence in the previous step, insert the next workpiece into the previous workpiece, and compare the smallest makespan and save it; (4) Repeat the previous step to arrive at the final result.