International Journal of Industiral Engineering & Producion Research
نشریه بین المللی مهندسی صنایع و تحقیقات تولید
IJIEPR
Engineering & Technology
http://ijiepr.iust.ac.ir
18
agent2
2008-4889
2345-363X
10.22068/ijiepr
en
jalali
1391
11
1
gregorian
2013
2
1
24
1
online
1
fulltext
en
Entropic Economic Order Quantity Model for Items with Imperfect Quality Considering Constant Rate of Deterioration under Fuzzy Inflationary Conditions
Material Managment
Material Managment
پژوهشي
Research
It was suggested in 2004 by some researchers that it might be possible to improve production systems performance by applying the first and second laws of thermodynamics to reduce system entropy. Then these laws were used to modify the economic order quantity (EOQ) model to derive an equivalent entropic order quantity (EnOQ). Moreover the political instability or uncertainty of a country (as well as the whole world) leads to a much more unstable situation in the present world economy. Thus, changes in inflation take place, and it is needed to consider uncertain inflation rate. In this paper we extend the EnoQ model by considering deteriorating items with imperfect quality and price dependent demand. We also assume fuzzy inflation and discount rates. A mathematical model is developed to determine the number of cycles that maximizes the present value of total revenue in a finite planning horizon. The fuzzified model for inflation and discount rate is formulated and solved by two methods: signed distance and fuzzy numbers ranking. Numerical examples are presented and results are discussed. Results show that the number of cycles decreases in fuzzy inflationary conditions. They also illustrate that defuzzification method results in more cycles than fuzzy method.
inventory, price dependent demand, fuzzy inflation, imperfect items, Thermodynamics laws
91
99
http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-31-1&slc_lang=en&sid=1
M.
Ameli
m.ameli@tmu.ac.ir
`180031947532846002333`

180031947532846002333
No
Tarbiat Moallem University of Tehran
A.
Mirzazadeh
a.mirzazadeh@aut.ac.ir
`180031947532846002334`

180031947532846002334
Yes
Tarbiat Moallem University of Tehran
M.
Shirazi
akbarpour@aut.ac.ir
`180031947532846002335`

180031947532846002335
No
Amirkabir University of Technology