Research on Parameter Optimization of the Express Warehousing and Distribution System Based on the Box–Behnken Response Surface Methodology

Table 3

Results of analysis of variance.

	Source	Sum of squares	df	Mean square	F value	value
Operation time	Model	456.83	14	32.63	539.35	<0.0001
	A	299.20	1	299.20	4945.46	<0.0001
	B	5.47	1	5.47	90.37	<0.0001
	C	0.0000	1	0.0000	0.0000	1.0000
	D	0.0000	1	0.0000	0.0000	1.0000
	AB	0.9801	1	0.9801	16.20	0.0013
	AC	0.0000	1	0.0000	0.0000	1.0000
	AD	0.0000	1	0.0000	0.0000	1.0000
	BC	0.0000	1	0.0000	0.0000	1.0000
	BD	0.0000	1	0.0000	0.0000	1.0000
	CD	0.0000	1	0.0000	0.0000	1.0000
	A^2	142.58	1	142.58	2356.63	<0.0001
	B^2	1.68	1	1.68	27.70	0.0001
	C^2	0.0072	1	0.0072	0.1191	0.7351
	D^2	0.0072	1	0.0072	0.1191	0.7351
	Residual	0.8470	14	0.0605
	Lack of fit	0.8470	10	0.0847
	Pure error	0.0000	4	0.0000
	Cor total	457.68	28
Blockage rate	Model	13455.10	14	961.08	34.10	<0.0001
	A	9781.23	1	9781.23	347.04	<0.0001
	B	131.34	1	131.34	4.66	0.0487
	C	1940.56	1	1940.56	68.85	<0.0001
	D	18.50	1	18.50	0.6564	0.4314
	AB	39.69	1	39.69	1.41	0.2551
	AC	5.76	1	5.76	0.2044	0.6581
	AD	0.2500	1	0.2500	0.0089	0.9263
	BC	60.84	1	60.84	2.16	0.1639
	BD	48.30	1	48.30	1.71	0.2116
	CD	0.0000	1	0.0000	0.0000	1.0000
	A^2	1284.25	1	1284.25	45.57	<0.0001
	B^2	43.29	1	43.29	1.54	0.2356
	C^2	3.45	1	3.45	0.1224	0.7317
	D^2	4.87	1	4.87	0.1729	0.6839
	Residual	394.58	14	28.18
	Lack of fit	394.58	10	39.46
	Pure error	0.0000	4	0.0000
	Cor total	13849.68	28