A Scheduling Problem to Minimize Total Weighted Tardiness in the Two-Stage Assembly Flowshop

Table 3

The performance summary of the four heuristic algorithms.

n	m	HEDD		HWT		WSPTMAX		WSPTAVER
		Aver. error	NO	Aver. error	NO	Aver. error	NO	Aver. error	NO
5	2	0.881	32	0.650	80	0.639	89	0.648	94
	4	0.875	35	0.656	83	0.655	94	0.695	71
	6	0.882	30	0.655	98	0.676	92	0.696	76
7	2	0.867	33	0.633	68	0.639	72	0.644	58
	4	0.868	26	0.655	73	0.660	68	0.698	48
	6	0.898	25	0.667	83	0.695	64	0.703	56
9	2	0.832	43	0.678	61	0.685	63	0.688	53
	4	0.846	37	0.650	80	0.685	56	0.700	35
	6	0.851	36	0.659	83	0.691	45	0.709	46
11	2	0.821	42	0.703	52	0.675	58	0.699	48
	4	0.829	44	0.674	64	0.695	46	0.721	42
	6	0.837	40	0.647	86	0.712	37	0.743	28
13	2	0.831	41	0.680	45	0.637	49	0.661	53
	4	0.843	41	0.653	77	0.683	37	0.707	29
	6	0.826	45	0.675	82	0.707	29	0.715	26
15	2	0.809	46	0.673	52	0.665	50	0.680	40
	4	0.807	49	0.662	73	0.714	34	0.733	26
	6	0.830	44	0.656	73	0.696	36	0.703	30