Table 5. Results of the three methods for solving the weakly heterogeneous classification and packing problem.

Examples	Item	Tsai & Li (2006)	Tsai, Wang & Lin (2015)	Proposed method
Problem05	CPU time (s)	75	9	0.52
	No. of total 0–1 variables	240	156	132
	Solution (L, W, H)	(9, 8, 5)	(9, 8, 5)	(9, 8, 5)
Problem06	CPU time (s)	186	43	1.25
	No. of total 0–1 variables	297	180	162
	Solution (L, W, H)	(10, 8, 6)	(10, 8, 6)	(10, 8, 6)