Table 4.

Parameter range related to unexpected events and abnormal operations in the scene.

Number	Event type	Event frequency (times/hour)	Event duration (s)	The system response time (s)	Event influence scope (square meters)	Event repair time (s)
B1	Object disappears	2.0-8.9	0.7–8.8	0.2–4.8	37.6-152.1	3.8–17.4
B2	Sudden power failure	2.4–9.5	0.9–8.9	0.3–4.5	12.5-195.8	2.4–16.5
B3	Operation lag	2.2–9.8	1.4–9.2	0.8–4.6	18.1-169.5	3.3–19.2
B4	UI failure	2.4–8.4	1.4–9.4	0.4–4.9	13.5-161.1	4.5–19.0
B5	UI failure	1.9–8.7	0.8–8.5	1.0-4.1	15.3-189.1	1.0-16.9
B6	Sudden power failure	2.5–9.2	0.6–8.2	1.0-4.9	33.7-170.5	1.1–17.1
B7	Sudden power failure	2.6–10.0	0.9–9.2	0.4-5.0	16.4-151.6	1.4–19.4
B8	Operation Lag	3.0-9.1	1.6–8.8	0.6–4.6	38.9-177.4	2.6–15.6
B9	Sudden power failure	1.2–8.8	0.6–8.3	0.9–4.2	18.9-167.7	2.2–18.9
B10	Object disappears	1.6–8.6	0.6-9.0	0.3–4.5	38.6-174.6	2.9–15.2