Ser
Notations
Description
1
Production rate.
2
Demand rate at time T where 
is any positive integer and 
satisfying the condition
.
3
Very small amount of constant decay rate for unit inventory.
4
Inventory level at instant
.
5
Un-decayed inventory at 
to
.
6
Un-decayed inventory at 
to
.
7
Deteriorating inventory at 
to
.
8
Deteriorating inventory at 
to
.
9
Inventory level at time T which depicts 0 and 
respectively at 
and
.
10
Vary small portion of instant
.
11
Set up cost.
12
Average holding cost.
13
Total cost in terms of
.
14
Optimum order quantity.
15
Optimum order interval.