Fig 1.
Flowchart.
Fig 2.
PACF Plot of Data Phase I: (a)AR (1), MA (1), and (c) ARMA (1,1).
Fig 3.
I-MR Control Charts for Data Phase I and Phase II: (a) AR (1), (b) MA (1), (c) ARMA (1,1).
Table 1.
Number of Out-of-Control Observations.
Fig 4.
Time Series Plot of GDP Values: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Fig 5.
ACF plot for GDP Growth: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Fig 6.
PACF plot for GDP Growth phase I: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Table 2.
Evaluation Performance each Iteration.
Table 3.
Model Evaluation Performance.
Fig 7.
XGBoost Model for GDP Growth: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Fig 8.
ACF residual plot phase I and II: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Fig 9.
I-MR Residual Control Chart: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Table 4.
Model Evaluation Performance Comparison.
Fig 10.
ARIMA Forecast plot for GDP Growth: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.
Table 5.
Comparison of Out-of-Control Counts Across Models.
Fig 11.
I-MR ARIMA Residual based Control Chart: (a) Indonesia, (b) Brunei Darussalam, (c) Malaysia, (d) Singapore, (e) Thailand.