Table 1. Class of pigs corresponding to each location.

Class	Population variables	Animal	Location
i ∈ {1, 2, …10}	Si, Ei, Ii, Ri	Gilts	Gilt development room
i ∈ {11, 12, …26}	−	Pregnant sows	Breeding/gestation room
i ∈ {27, 28, 29, 30}	−	Farrowing sows	Farrowing room
i ∈ {31}	−	Weaned sows	Breeding/gestation room
j ∈ {1, 2, 3, 4}	$S_j^p,E_j^p,I_j^p,R_j^p$	Piglets	Farrowing room
j ∈ {5, 6, …, 24}	$S_j^p,E_j^p,I_j^p,R_j^p$	Growing pigs	Growing pigs room