Table 5.

Best values of makespan for the HHOSA algorithm and compared algorithms.

	Instances	PSO	FA	SSA	MFO	HHO	HHOSA
Synthetic	200	59.64	56.49	47.86	48.39	38.10	33.12
	400	125.52	112.26	108.40	99.34	79.25	65.40
	600	190.63	176.91	162.81	158.01	113.51	97.74
	800	238.09	234.49	226.58	216.99	145.30	128.24
	1000	305.77	295.40	276.70	273.49	182.61	161.67
NASA iPSC	500	82.56	74.94	67.67	66.84	54.64	44.94
	1000	171.04	156.75	146.40	140.84	107.12	91.08
	1500	258.61	241.37	234.42	230.50	157.69	139.14
	2000	349.12	338.03	322.88	307.89	201.81	188.14
	2500	451.38	432.00	416.74	400.70	261.21	238.47
HPC2N	500	8946.52	8760.62	8001.93	8053.29	5572.43	4890.72
	1000	20793.74	19682.11	18496.02	18095.98	12253.81	10648.83
	1500	33361.63	31727.51	29824.93	29295.83	19732.12	17206.45
	2000	48135.05	45749.89	43808.80	42632.18	28076.55	25031.56
	2500	62713.88	60024.49	58845.85	58104.48	36228.46	32769.49