Table 9 Parameter of membership function for percentage of anomaly occurrence
From: Anomaly detection in business processes using process mining and fuzzy association rule learning
Membership function of low | Membership function of middle | Membership function of high | |||
|---|---|---|---|---|---|
Degree | Condition | Degree | Condition | Degree | Condition |
0 | x < a | 0 | x < a | 0 | x < a |
(x − a)/(b − a) | a ≤ x < b | (x − a)/(b − a) | a ≤ x < b | (x − a)/(b − a) | a ≤ x < b |
1 | b ≤ x <= c | 1 | b ≤ x ≤ c | 1 | x ≥ b |
(d − x)/(d − c) | c < x < d | (d − x)/(d − c) | c < x < d |  |  |
0 | x ≥ d | 0 | x ≥ d |  |  |