Setting input parameters for the NSM
Let ${\mathrm{\Lambda }}_i\leftarrow$ no.of confirmed cases
${\mathrm{\Theta }}_i\leftarrow$ no.of tested cases
$\mathrm{\Delta }{\mathrm{\Theta }}_i\leftarrow$ average daily confirmed cases
$\mathrm{\Delta }{d}_i\leftarrow$ average tested cases
${\mathrm{Im}}_i\leftarrow$ no.of imported cases
${\mathrm{Ib}}_i\leftarrow$ no.of inbound cases
if $C({\mathrm{\Lambda }}_i,{\mathrm{\Theta }}_i)=0:0.3$
then $\mathrm{\Gamma }=0.1$
elseif $C({\mathrm{\Lambda }}_i,{\mathrm{\Theta }}_i)=0.3:0.7$
then $\mathrm{\Gamma }=0.5$
else
$C({\mathrm{\Lambda }}_i,{\mathrm{\Theta }}_i)=0.7:1.0$
then $\mathrm{\Gamma }=1.0$
for ${\mathrm{\Lambda }}_i=0:50$
if $L=1$ $\#$level 1
then $\mathrm{\Psi }$ =1.0
else $\mathrm{\Psi }$ =0.25
for ${\mathrm{\Lambda }}_i=50:100$
if $L=2$ $\#$level 2
then $\mathrm{\Psi }$ =1.0
elseif $L=1$ $\#$level 1
then $\mathrm{\Psi }$ =0.5
else $\mathrm{\Psi }$ =0.25
for ${\mathrm{\Lambda }}_i=100:200$
if $L=3$ $\#$level 3
then $\mathrm{\Psi }$ =1.0
elseif $L=2$ $\#$level 2
then $\mathrm{\Psi }$ =0.5
else $\mathrm{\Psi }$ =0.25
if $\delta =0:100$
then $S({\mathrm{\Theta }}_i)$ =0.2
elseif $\delta =100:200$
then $S({\mathrm{\Theta }}_i)$ =0.4
elseif $\delta =200:500$
then $S({\mathrm{\Theta }}_i)$ =0.8
else $\delta =500:1000$
then $S({\mathrm{\Theta }}_i)$ =1.0
if $C({\mathrm{Im}}_i,{\mathrm{Ib}}_i)=0:0.3$
then $\mathrm{\Phi }=0.1$
elseif $C({\mathrm{Im}}_i,{\mathrm{Ib}}_i)=0.3:0.7$
then $\mathrm{\Phi }=0.5$
else
$C({\mathrm{Im}}_i,{\mathrm{Ib}}_i)=0.7:1.0$
then $\mathrm{\Phi }=1.0$
if $\varpi =0:30\%$
then $\mathrm{\Xi }$ =0.22
elseif $\varpi =30:50\%$
then $\mathrm{\Xi }$ =0.4
elseif $\varpi =50:80\%$
then $\mathrm{\Xi }$ =0.8
else $\varpi =80:100$
then $\mathrm{\Xi }$ =1.0
Determine the normative safety measure
Calculate $\mathrm{\Gamma }=C({\mathrm{\Lambda }}_i,{\mathrm{\Theta }}_i)\leftarrow$ correlation between ${\mathrm{\Lambda }}_i$ and ${\mathrm{\Theta }}_i$
Determine the score of social distance level $(\mathrm{\Psi })$
Evaluate the speed of testing cases $S({\mathrm{\Theta }}_i)$
Calculate $\mathrm{\Phi }=C({\mathrm{Im}}_i,{\mathrm{Ib}}_i)\leftarrow$ correlation between $I{m}_i$ and $I{b}_i$
Determine $\mathrm{\Xi }$ score of mask wearing level
Calculate NSM(R)
Sort $\mathrm{NSM}(\mathrm{R})$ by ascending order