Hobbit: Providing Fall Detection and Prevention for the Elderly in the Real World

Table 2

System reliability across 18 PU.

(a)

muc mode	Statistics	Call Hobbit	Come closer	Stop Hobbit	Emergency	Pick up object	Teach a new object	Bring object to user	Calendar reminders	Follow me	Move to location
Device	Days total	226	226	226	226	226	226	226	226	226	226
	Days of introduction	31	31	31	31	31	31	31	31	31	31
	Days switched off	55	55	55	55	55	55	55	55	55	55
	Days in use	140	140	140	140	140	140	140	140	140	140
	Days when feature was not working	14	13	13	19	84	12	79	49	105	15
	Days when feature was only partially working	23	20	22	44	47	116	62	83	13	32
Companion	Days total	148	148	148	148	148	148	148	148	148	148
	Days switched off	20	20	20	20	20	20	20	20	20	20
	Days in use	128	128	128	128	128	128	128	128	128	128
	Days when feature was not working	14	10	8	12	83	17	85	54	92	9
	Days when feature was only partially working	25	16	17	38	40	95	43	64	18	29
Device	Working over days in use	81.79%	83.57%	82.86%	70.71%	23.21%	50.00%	21.43%	35.36%	20.36%	77.86%
Companion	Working over days in use	79.30%	85.94%	87.11%	75.78%	19.53%	49.61%	16.80%	32.81%	21.09%	81.64%

(b)

muc mode	Statistics	Go recharge	Take a break	Telephone	Information	Surprise me	Entertainment audio	Entertainment games	Entertainment fitness	Reward
Device	Days in total	226	226	226	226	226	226	226	226	226
	Days of introduction	31	31	31	31	31	31	31	31	31
	Days feature was disabled	55	55	55	55	55	55	55	55	55
	Days of feature in use	140	140	140	140	140	140	140	140	140
	Days when feature was not working	19	16	19	11	11	11	23	20	11
	Days when feature was only partially working	20	6	22	9	23	7	20	27	6
Companion	Days in total	148	148	148	148	148	148	148	148	148
	Days feature was disabled	20	20	20	20	20	20	20	20	20
	Days of feature in use	128	128	128	128	128	128	128	128	128
	Days when feature was not working	10	8	22	8	8	7	26	19	14
	Days when feature was only partially working	33	9	16	7	23	8	11	23	7
Device	Working over days in use	79.29%	86.43%	78.57%	88.93%	83.93%	89.64%	76.43%	76.07%	90.00%
Companion	Working over days in use	79.30%	90.23%	76.56%	91.02%	84.77%	91.41%	75.39%	76.17%	86.33%