Many researchers (e.g., Tat et al. 2015; Taleizadeh 2014) assumed that the deterioration of the items in inventory starts from the instant of their arrival in stock.
Some researchers assume that the deterioration of the items in inventory starts from the instant of their arrival; however, many goods maintain freshness or original condition for a period of time.
The research on various replenishment policies is typically addressed by developing proper mathematical models in inventory management system that consider factors such as demand rate, deterioration of inventory items, permissible delay in payments, effects of inflation and time value of money, shortages, and finite planning horizon, to mention only a few.
Many researchers such as Ghare and Schrader (1963), Philip (1974), Goyal and Giri (2001), Li and Mao (2009), Geetha and Udayakumar (2015) and Mahata (2015) assume that the deterioration of the items in inventory starts from the instant of their arrival.
Thus, combination of varying microclimate and porous material (stucco) in WM seems to be related to the deterioration of this item by salt weathering.
Travelers like Shawn Dean, a sales executive for a management training company who spends a week a month on the road, say they have noticed the deterioration in the quality of items like bed linens over the last couple of years.
During time t 1, the inventory is depleted due to the deterioration and demand of item.
Deterioration takes place after the life time of items.
Vegetables, fruits, foods, perfumes, chemicals, pharmaceutical, radioactive substances and electronic equipments, etc., are examples of deteriorating items, i.e., the loss characteristics of items at any time is regarded as deterioration.
