Table 7.

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

	Instances	PSO	FA	SSA	MFO	HHO	HHOSA
Synthetic	200	70.01	65.16	67.63	62.35	47.85	36.84
	400	139.31	131.25	131.74	137.68	91.24	74.56
	600	208.36	199.44	195.70	200.54	137.98	111.43
	800	270.97	258.75	261.55	261.78	176.48	147.32
	1000	343.91	320.15	332.00	334.82	228.45	177.86
NASA iPSC	500	96.88	87.83	89.68	87.57	64.94	49.09
	1000	194.88	175.43	178.62	187.98	137.02	103.91
	1500	290.92	274.93	266.68	290.62	199.25	161.69
	2000	389.26	365.76	370.27	372.62	276.77	209.73
	2500	497.98	469.99	475.52	470.00	337.07	270.55
HPC2N	500	10437.89	9729.10	9978.12	10015.48	6935.65	5338.96
	1000	22614.70	21187.87	21164.00	21352.51	14824.45	12335.51
	1500	35691.54	33880.20	34633.10	35055.64	23411.63	19072.55
	2000	51169.14	49156.43	49927.90	50376.81	35356.93	28300.92
	2500	68804.23	66036.35	65412.07	68422.54	44466.31	37691.71