Hidden Semi-Markov Models for Predictive Maintenance

Table 1

State recognition accuracy.

(a) Continuous observations

Test case	Duration distribution
	Gaussian	Gamma	Weibull
1	99.4%	98.5%	99.2%
2	99.7%	98.6%	99.5%
3	99.4%	99.2%	99.7%
4	98.9%	98.9%	99.7%
5	98.2%	98.9%	100%
6	99.1%	98.8%	99.7%
7	98.5%	99.4%	99.7%
8	99.2%	99.1%	99.5%
9	99.2%	98.6%	99.7%
10	99.2%	99.1%	99.5%
Average	99.1%	98.9%	99.6%

(b) Discrete observations

Test case	Duration distribution
	Gaussian	Gamma	Weibull
1	97.4%	96.7%	97.4%
2	97.2%	97.6%	96.5%
3	99.4%	95.8%	96.6%
4	98.2%	95.3%	97.7%
5	99.1%	97.4%	97.5%
6	97.8%	97.7%	97.8%
7	95.8%	97.2%	96.6%
8	97.7%	96.4%	97.2%
9	98.9%	97.2%	98.5%
10	99.2%	95.6%	96.9%
Average	98.1%	96.7%	97.3%