CR Mean contamination ratio or error
Gi Outflow rate of grade i, kg h1
Ki Fraction of cost as related to grade i
Ni Number of grade i fruit of the total assortment at
the beginning of sizing
Nij Number of grade j fruit in the grade i receiver
Ngi Number of grade i fruit in grade j receiver
Nti Total fruit in grade i receiver, kg
Pi Fraction of grade i fruit of the total mixture at the
beginning of sizing
Pgi Fraction of correct fruit in grade i receiver
t Feeding time, h
Wi Weighting function
wi Total weight of fruit in grade i receiver, kg
wt Total fruit weight fed into sizing system, kg