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This paper deals with the effects of inflation and time discounting on an  inventory model with general ramp type demand rate, time dependent (Weibull)  deterioration rate and partial backlogging of unsatisfied demand. The model  is studied under the replenishment policy, starting with shortages under two  different types of backlogging rates, and their comparative study is also  provided. We then use the computer software, MATLto find the optimal  replenishment policies. Duration of positive inventory level is taken as the  decision variable to minimize the total cost of the proposed system.  Numerical examples are then taken to illustrate the solution procedure.  Finally, sensitivity of the optimal solution to changes of the values of  different system parameters is also studied

A study of inflation effects on an EOQ model for Weibull deteriorating/ameliorating items with ramp type of demand and shortages