scholarly journals An economic order quantity model with ramp type demand rate, constant deterioration rate and unit production cost

2016 ◽  
Vol 26 (3) ◽  
pp. 305-316 ◽  
Author(s):  
Prasenjit Manna ◽  
Swapan Manna ◽  
Bibhas Giri
Keyword(s):  
Production Cost ◽  
Stopping Time ◽  
Economic Order Quantity ◽  
Order Quantity ◽  
Unit Production Cost ◽  
Deterioration Rate ◽  
Time Optimal ◽  
Demand Rate ◽  
Ramp Type Demand ◽  
Constant Deterioration

We have developed an order level inventory system for deteriorating items with demand rate as a ramp type function of time. The finite production rate is proportional to the demand rate and the deterioration rate is independent of time. The unit production cost is inversely proportional to the demand rate. The model with no shortages case is discussed considering that: (a) the demand rate is stabilized after the production stopping time and (b) the demand is stabilized before the production stopping time. Optimal costs are determined for two different cases.

A Fuzzy EOQ Model for Deteriorating Items With Allowable Shortage and Inspection Under the Trade Credit

2018 ◽  
pp. 233-249
Author(s):  
Chandra K. Jaggi ◽  
Bimal Kumar Mishra ◽  
T. C. Panda
Keyword(s):  
Trade Credit ◽  
Method Comparison ◽  
Deteriorating Items ◽  
Order Quantity ◽  
Centroid Method ◽  
Deterioration Rate ◽  
Eoq Model ◽  
Permissible Delay In Payment ◽  
Demand Rate ◽  
Fuzzy Cost

This chapter develops an economic order quantity model for deteriorating items with initial inspection, allowable shortage under the condition of permissible delay in payment by fuzzify the demand rate, deterioration rate and inspection parameter of non-defective parameter based on as triangular fuzzy numbers to fit the real word. The total fuzzy cost function has been defuzzified using signed distance and centroid method. Comparison between these two methods has also been discussed. The validity of the model has been established with the help of a hypothetical numerical example.

An Optimal Inventory Policy for Items Having Constant Demand and Constant Deterioration Rate with Trade Credit

2012 ◽  
Vol 5 (2) ◽  
pp. 89-95 ◽  
Author(s):  
R. P. Tripathi ◽  
S. S. Misra
Keyword(s):  
Trade Credit ◽  
Optimal Order ◽  
Order Quantity ◽  
Inventory Models ◽  
Inventory Policy ◽  
Deterioration Rate ◽  
Optimal Order Quantity ◽  
Optimal Ordering ◽  
Constant Deterioration ◽  
Ordering Quantity

In most of the classical inventory models the demand is considered as constant. In this paper the model has been framed to study the items whose demand and deterioration both are constant. The authors developed a model to determine an optimal order quantity by using calculus technique of maxima and minima. Thus, it helps a retailer to decide its optimal ordering quantity under the constraints of constant deterioration rate and constant pattern of demand.

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