Page 334 - NIEN GIAM 2017

- Step 1: Calculating Inventory index of each commodity

Formula:

q
i Kn  Kn 1  100
q Kn 0

Where:
i : Inventory index of commodity n;
Kn
q Kn1 : Quantity of Inventory commodity n at reference time;

q Kn0 : Quantity of Inventory commodity n at base time.
- Step 2: Calculating Inventory index of VSIC 4-digit industries

Formula:

i h
I   Kn Kn
 h Kn
KN
4
Where:
I Kn4 : Inventory index of VSIC 4-digit industry;
th
I : Inventory index of commodity n in VSIC 4-digit industries;
Kn
h : Weight of commodity n.
Kn
Weight of commodity is the value of average inventory of
commodity at base year of 2010 (average of the beginning and the end of
2010).

- Step 3: Calculating inventory index of VSIC 2-digit industries

Formula:

I h
I   KN 4 KN 4
 h KN 4
KN
2
Where:
I KN2 : Inventory index of VSIC 2-digit industry;

I KN4 : Inventory index of VSIC 4-digit industry;
h KN4 : Weight of VSIC 4-digit industry.

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