A Four-Type Decision-Variable MINLP Model for a Supply Chain Network Design

Table 8

Computational results for all instances.

	Instance 1	Instance 2	Instance 3
Total variables	2,818	10,895	21,423
Binary variables	1,293	4,366	8,142
Functional constraints	1,444	5,061	10,107
Calls to NLP and MILP solvers	12	3	2
Iterations for NLP solver	12	3	2
Iterations for MILP solver	6,888,781	3,228,522	2,175,477
Total time (sec)	8,013.87	10,383.49	15,342.75
Used memory (MB)	96.7	101.0	131.2