\(\theta_{o}^{\text{Test}\ \text{unit}}=\operatorname{max=max}\frac{\sum_{d_{3}=1}^{D_{3}}\eta_{d_{3}}z_{d_{3}o}-\sum_{r_{4}=1}^{R_{4}}u_{r_{4}}y_{r_{4}o}}{\sum_{i_{4}=1}^{I_{4}}v_{i_{4}}x_{i_{4}0}+\sum_{d_{2}=1}^{D_{2}}\eta_{d_{2}}z_{d_{2}o}}\) (3)
\(\operatorname{s.t.\ \ \ \ \ \ =}\frac{\sum_{d_{3}=1}^{D_{3}}\eta_{d_{3}}z_{d_{3}j}-\sum_{r_{4}=1}^{R_{4}}u_{r_{4}}y_{r_{4}j}}{\sum_{i_{4}=1}^{I_{4}}v_{i_{4}}x_{i_{4}j}+\sum_{d_{2}=1}^{D_{2}}\eta_{d_{2}}z_{d_{2}j}}\leq 1\ \ ,\ \ \ j=1,\ldots,n\)
\(\eta_{d_{2}},\eta_{d_{3}},\ v_{i_{4}},\ u_{r_{4}}\ \geq\ 0,\ d_{2}=1,2,\ldots,D_{2}\ ;\ d_{3}=1,2,\ldots,D_{3}\ ;\ \) \(i_{4}=1,2,\ldots,I_{4}\ ;\ r_{4}=1,2,\ldots,R_{4}\).