$Z_{\mathit{mDSVt}}$	The quantity of transported medicines $m$ from DC $D$ to warehouse $S$ using vehicle $V$ at the period $t$
$Z_{\mathit{mPDVt}}$	The quantity of transported medicines $m$ from MP $P$ to DC $D$ using vehicle $V$ at the period $t$
$Z_{mP{}^{\prime }DVt}$	The quantity of transported medicines $m$ from LP $P{}^{\prime }$ to DC $D$ using vehicle $V$ at the period $t$
$Z_{mPP{}^{\prime }Vt}$	The quantity of transported medicines $m$ from MP $P$ to LP $P{}^{\prime }$ using vehicle $V$ at the period $t$
$Z_{\mathit{mSHVt}}$	The quantity of transported medicines $m$ from warehouse $S$ to hospital $H$ using vehicle $V$ at the period $t$
$Z_{\mathit{mSWVt}}$	The quantity of transported medicines $m$ from warehouse $S$ to pharmacy $W$ using vehicle $V$ at the period $t$
$Z_{\mathit{mWHVt}}$	The quantity of transported medicines $m$ from pharmacy $W$ to hospital $H$ using vehicle $V$ at the period $t$
${\mathrm{\Delta }}_{\mathit{mPt}}$	The amount of produced medicines $m$ in the MP $P$ at the period $t$
${\mathrm{\Delta }}_{mP{}^{\prime }t}$	The amount of produced medicines $m$ in the LP $P{}^{\prime }$ at the period $t$
$M_{\mathit{mPt}}$	The inventory level of medicines $m$ at MP $P$ at the period $t$
$M_{mP{}^{\prime }t}$	The inventory level of medicines $m$ at LP $P{}^{\prime }$ at the period $t$
$M_{\mathit{mSt}}$	The inventory level of medicines $m$ at warehouse $S$ at the period $t$
$M_{\mathit{mDt}}$	The inventory level of medicines $m$ at DC $D$ at the period $t$
$M_{\mathit{mWt}}$	The inventory level of medicines $m$ at pharmacy $W$ at the period $t$
$M_{\mathit{mHt}}$	The inventory level of medicines $m$ at hospital $H$ at the period $t$
${\eta }_{\mathit{VDSt}}$	If the vehicle $V$ travels from DC $D$ to warehouse $S$ equal to 1 at the period $t$; otherwise 0
${\eta }_{\mathit{VPDt}}$	If the vehicle $V$ travels from MP $P$ to DC $D$ equal to 1 at the period $t$; otherwise 0
${\eta }_{VP{}^{\prime }Dt}$	If the vehicle $V$ travels from LP $P{}^{\prime }$ to DC $D$ equal to 1 at the period $t$; otherwise 0
${\eta }_{VPP{}^{\prime }t}$	If the vehicle $V$ travels from MP $P$ to LP $P{}^{\prime }$ equal to 1 at the period $t$; otherwise 0
${\eta }_{\mathit{VSWt}}$	If the vehicle $V$ travels from warehouse $S$ to pharmacy $W$ equal to 1 at the period $t$; otherwise 0
${\eta }_{\mathit{VWHt}}$	If the vehicle $V$ travels from pharmacy $W$ to hospital $H$ equal to 1 at the period $t$; otherwise 0
${\eta }_{\mathit{VSHt}}$	If the vehicle $V$ travels from warehouse $S$ to hospital $H$ equal to 1 at the period $t$; otherwise 0
$N_{\mathit{oS}}$	If a warehouse with capacity level $o$ is opened at location $S$ equal to 1; otherwise 0
$N_{\mathit{uD}}$	If a DC with capacity level $u$ is opened at location $D$ equal to 1; otherwise 0
$J_{\mathit{SWt}}$	If a warehouse $S$ is allocated to pharmacy $W$ at the period $t$ equal to 1; otherwise 0
$J_{\mathit{SHt}}$	If a warehouse $S$ is allocated to hospital $H$ at the period $t$ equal to 1; otherwise 0
$J_{\mathit{DSt}}$	If a DC $D$ is allocated to warehouse $S$ at the period $t$ equal to 1; otherwise 0
$J_{\mathit{PDt}}$	If a MP $P$ is allocated to DC $D$ at the period $t$ equal to 1; otherwise 0
$J_{P{}^{\prime }Dt}$	If a LP $P{}^{\prime }$ is allocated to DC $D$ at the period $t$ equal to 1; otherwise 0