Experimental Evaluation of FSM-Based Testing Cost for Time-Delay Systems

Table 5

Levels for each factor.

Factor	Levels	Level range
Number of states (𝑛)	5, 8, 14, 20	3~20
Number of inputs (𝑘)	0.2𝑛, 0.4𝑛,; 0.6𝑛, 0.8𝑛	0.2n~0.8n
Number of outputs (𝑚)	2, 4, 7, 10	2~10
Completeness degree (𝑑)	1.0	—
Accessibility; degree (𝑟)	0.6 * (𝑛−1), 0.8 * (𝑛−1),; 1.0 * (𝑛−1)	~(𝑛−1)