Computational and Mathematical Methods in Medicine

Research Article

Optimal Installation Locations for Automated External Defibrillators in Taipei 7-Eleven Stores: Using GIS and a Genetic Algorithm with a New Stirring Operator

Table 2

Comparison of results for different AED service ranges when the number of 7-Eleven convenience stores is limited to 100, 150, or 200.


Parameter				100 stores for AED installation		150 stores for AED installation		200 stores for AED installation
AED service range	7-Eleven stores (N = 677)	OHCA (M = 1625)	Weighting scheme	Coverable OHCA cases	Coverable OHCA weights	Coverable OHCA cases	Coverable OHCA weights	Coverable OHCA cases	Coverable OHCA weights

100 meters	262 (38.70%)	323 (19.88%)	TWM	180 (55.73%)	56.23%	230 (71.21%)	73.04%	280 (86.69%)	88.40%
100 meters	262 (38.70%)	323 (19.88%)	SWM	176 (54.49%)	71.63%	229 (70.90%)	87.85%	278 (86.07%)	95.99%

150 meters	418 (61.74%)	623 (38.34%)	TWM	313 (50.24%)	48.47%	398 (63.88%)	61.85%	461 (74.00%)	72.46%
150 meters	418 (61.74%)	623 (38.34%)	SWM	292 (46.87%)	61.65%	375 (60.19%)	73.47%	440 (70.63%)	83.23%

200 meters	527 (77.84%)	908 (55.88%)	TWM	446 (49.12%)	47.16%	568 (62.56%)	60.57%	644 (70.93%)	70.01%
200 meters	527 (77.84%)	908 (55.88%)	SWM	418 (46.04%)	61.09%	522 (57.49%)	71.83%	618 (68.06%)	80.20%

250 meters	595 (87.89%)	1117 (68.74%)	TWM	584 (52.28%)	50.81%	723 (64.73%)	63.15%	818 (73.23%)	72.58%
250 meters	595 (87.89%)	1117 (68.74%)	SWM	549 (49.15%)	61.04%	674 (60.34%)	74.43%	781 (69.92%)	80.6%

300 meters	623 (92.02%)	1271 (78.22%)	TWM	704 (55.39%)	53.88%	861 (67.74%)	66.42%	999 (78.60%)	77.43%
300 meters	623 (92.02%)	1271 (78.22%)	SWM	658 (51.77%)	66.25%	827 (65.07%)	76.01%	951 (74.82%)	82.57%

350 meters	646 (95.57%)	1380 (84.92%)	TWM	834 (60.43%)	59.27%	1014 (73.48%)	72.10%	1125 (81.52%)	81.04%
350 meters	646 (95.57%)	1380 (84.92%)	SWM	804 (58.26%)	69.58%	969 (70.22%)	80.85%	1098 (79.57%)	86.17%

400 meters	657 (97.05%)	1440 (88.62%)	TWM	920 (63.89%)	63.23%	1107 (76.88%)	76.20%	1261 (87.57%)	86.89%
400 meters	657 (97.05%)	1440 (88.62%)	SWM	880 (61.11%)	74.81%	1068 (74.17%)	83.67%	1204 (83.61%)	89.55%

450 meters	660 (97.49%)	1473 (90.65%)	TWM	1037 (70.40%)	69.32%	1227 (83.30%)	82.40%	1337 (90.77%)	90.28%
450 meters	660 (97.49%)	1473 (90.65%)	SWM	989 (67.14%)	76.37%	1184 (80.38%)	87.07%	1300 (88.26%)	92.22%

500 meters	664 (98.08%)	1501 (92.37%)	TWM	1148 (76.48%)	75.26%	1307 (87.08%)	86.61%	1400 (93.27%)	92.72%
500 meters	664 (98.08%)	1501 (92.37%)	SWM	1126 (75.02%)	81.00%	1277 (85.08%)	89.15%	1376 (91.67%)	94.83%