This research methodology was presented as Fig.2 It is
summarized as follows:
Step 1 Data collection. In this study, researchers collected
the data for the past 3 years of price of the crude palm oil
(CPO), pure palm oil of Thailand and Malaysia, soybean oil,
ribbed smoke sheet grade3 , biodiesel B100.
Step 2 : Analysing the relationship between Crude Palm oil
and other variables, In this step researchers analysed the
relationship between variables by using regression analysis.
Step 3 : Build the model forecasting, In this step researchers
finding the best model by Heteroska dasticity (ARCH–Test)
and Multicorrelinearity.
Step 4 : Model testing. In this step researchers testing the
effect of factors that the stability of palm oil by Auto
Regressive (AR) Integrated (I).