Table 3.

Department-Specific Model Result.

(a) Random Forest Model Results
Dept.	RMSE	MAE	MAPE	${\mathit{R}}^{\mathbf{2}}$	±10% *	±10 min ${}^{\ast }$	±5 min *	<10 min **	<5 min **	Sample_Count
	(min)	(min)	(%)		(%)	(%)	(%)	(%)	(%)
16	26.58	14.51	30	0.72	24	59	33	77	60	21,968
29	11.74	6.81	29	0.87	27	80	60	91	77	20,476
14	38.00	21.63	31	0.64	24	44	24	67	55	14,763
17	42.51	26.80	24	0.66	28	34	18	63	53	13,566
22	38.42	24.84	26	0.48	29	34	19	62	52	13,338
24	20.43	13.72	19	0.79	34	52	28	73	58	12,410
11	32.33	18.81	30	0.85	27	48	28	68	55	9874
28	47.86	25.88	31	0.68	26	40	22	66	56	7670
13	74.73	49.76	24	0.47	33	17	09	52	48	4017
15	35.63	15.11	21	−0.26	32	54	28	76	61	1965
12	62.21	43.15	28	0.67	24	22	10	53	45	1800
Average (weighted)	31.98	19.15	27	0.69	27	50	30	72	59	121,847
(b) XGB Model Results
Dept.	RMSE	MAE	MAPE	${\mathit{R}}^{\mathbf{2}}$	±10% *	±10 min ${}^{\ast }$	±5 min *	<10 min **	<5 min **	Sample_Count
	(min)	(min)	(%)		(%)	(%)	(%)	(%)	(%)
16	29.94	14.65	30	0.66	23	60	35	79	62	21,968
29	13.20	7.42	32	0.85	27	78	56	90	76	20,476
14	32.30	19.98	30	0.68	23	43	23	68	56	14,763
17	39.77	24.55	24	0.70	30	37	19	64	54	13,566
22	35.32	23.70	25	0.62	30	33	18	62	54	13,338
24	22.34	14.01	19	0.76	36	54	28	74	58	12,410
11	33.48	19.10	28	0.87	25	46	25	71	58	9874
28	51.31	28.14	33	0.71	22	36	18	64	54	7670
13	65.05	45.95	23	0.64	30	21	12	55	51	4017
15	35.50	15.55	22	−0.24	30	52	24	73	59	1965
12	56.67	38.27	26	0.73	31	25	09	56	47	1800
Average (weighted)	31.60	18.71	28	0.71	27	50	30	73	60	121,847

* proportion of samples within the ± variation; ** proportion of predicted samples within acceptable overtime in minutes.