Constraint

Expression

Description

C1: Capex

${\displaystyle \sum {\left(Capex\right)}_{ij}{x}_{ij}\le C_{\max }}$

Total Capex Limitation

C2: Production

${\displaystyle \sum q_{ij}{x}_{ij}\ge Q_{\min }}$

Production requirement

C3: Net Profit

${\displaystyle \sum {\left(Netprofit\right)}_{ij}{x}_{ij}\ge 0}$

Lowest net profit

C4: Capital Control

${\left(ROCE\right)}_{ij}\ge 2.5\%$

Minimum capital efficiency