Table 2. Denotation of the parameters and variables.

Indexes	Description
$l$	Sub operation number, $l\in L_n$
$m$	Transportation service number, $m\in M$
$n$	Operation number, $n\in N$
$s$	service point number, $s\in S$
Parameters	Description
$T{C}_{m\left(s,s^{\mathrm{\prime }}\right)}$	transportation service $m$’s cost between service point $s$ and $s^{\mathrm{\prime }}$, $T{C}_{m\left(s,s^{\mathrm{\prime }}\right)}=t{c}_m{d}_{s{s}^{\mathrm{\prime }}}$ ($)
$P{C}_{lns}$	the performance cost of subtask $S{O}_{ln}$ in service point $s$, ($)
$d_{s{s}^{\mathrm{\prime }}}$	Distance between service points $s$ and $s^{\mathrm{\prime }}$ (mile)
$t_{lns}$	Operation performing time $S{O}_{ln}$ in service point $s$ (hour)
$q_s$	Service quality of service point $s$ (%)
$op{c}_{lns}$	The operation performing cost $S{O}_{ln}$in service point $s$ ($ per hour)
$l{c}_m$	The cost of transportation service $m$ ($ per mile)
$S{O}_{ln}$	$l_{th}$ sub-operation of the $n_{th}$ operation
$O_k$	$n_{th}$ operation
$V_{ln}$	a binary parameter, $V_{ln}=$1, if operation $n$ needs sub-operation$l$, otherwise $V_{ln}=$0.
Variables	Description
${\sigma }_{lns}$	a binary variable, ${\sigma }_{lns}=$ 1, if sub-operation $l$ for operation $n$ in service point $s$ is to be fulfilled, otherwise ${\sigma }_{lns}=$0.
${\rho }_{m\left(s,s^{\mathrm{\prime }}\right)}^{n\left(l,l+1\right)}$	a binary variable, ${\rho }_{m\left(s,s^{\mathrm{\prime }}\right)}^{n\left(l,l+1\right)}=$ 1, if transportation service $m$ between two service points $s$ and $s$′ for proceeding from sub-operation $l$ to $l$+1 for operation $n$ is needed, otherwise ${\rho }_{m\left(s,s^{\mathrm{\prime }}\right)}^{n\left(l,l+1\right)}=$ 0.