For instance, a model depicting a developed nation may be assigned a higher value for a h due to its requirement to remain economically competitive whereas for a country without a proper healthcare system, one may assign higher values for a d and a t instead. Currently, we set a t ¼ 0.15, a d ¼ 0.45, a h ¼ 0.35 and a w ¼ 0.05 as we are investigating the use of testkits in a small city of a developed nation, but at the same time, we wish to minimize drug wastage.