Table 6.

The final model validation results on the COVID-19 daily recovered cases.

n-Day Forward Chaining	Block	Training Period	Forecasted Period	RMSE	MAE	MAPE (%)	U1
7-day interval	1	1 Dec 21–2 Apr 22	3–9 Apr 22	1999.88	1814.99	7.41	0.03
	2	1 Dec 21–9 Apr 22	10–16 Apr 22	748.85	663.08	2.57	0.01
	3	1 Dec 21–16 Apr 22	17–23 Apr 22	2523.33	1942.32	8.55	0.05
	4	1 Dec 21–23 Apr 22	24–30 Apr 22	4665.59	4235.41	22.55	0.10
			Average	2484.41	2163.95	10.27	0.05
14-day interval	1	1 Dec 21–2 Apr 22	3–16 Apr 22	2484.92	2296.17	9.15	0.04
	2	1 Dec 21–16 Apr 22	17–30 Apr 22	5238.33	4264.90	21.64	0.11
			Average	3861.63	3280.54	15.40	0.08
28-day interval	1	1 Dec 21–2 Apr 22	3–30 Apr 22	7554.66	6023.39	28.41	0.14