Discrete Particle Swarm Optimization with Scout Particles for Library Materials Acquisition

Table 5

Results of different swarm topologies on two test cases.

Case	Measure	Improvement		Execution time
		Star	Ring	Star	Ring
I	Average	62.47%	42.10%	1.3193	1.9219
	Stdev	0.2244	0.2216	0.4285	1.9427
	Observations	480	480	480	480
	z-score	12.1029		−6.6364
	𝑃 value	0.0000		0.0000
II	Average	80.98%	63.35%	772.2568	808.7178
	Stdev	0.4147	0.2934	370.76	262.47
	Observations	160	160	160	160
	z-score	4.3889		−1.0202
	𝑃 value	0.0000		0.3076