Table 5 Parameters of membership functions for linguistic values of occurence
From: Anomaly detection in business processes using process mining and fuzzy association rule learning
Membership function of VW | Membership function of BVW and W, W, BW and F, F, BF and S, S, BS and VS | Membership function of VS | |||
|---|---|---|---|---|---|
Degree | Condition | Degree | Condition | Degree | Condition |
1 | a ≤ x ≤ c | 0 | x ≤ a | 0 | x ≤ a |
(d − x)/(d − c) | c < x < d | (x − a)/(b − a) | a < x < b | (x − a)/(b − a) | a < x < b |
0 | x ≥ d|| x < a | 1 | b ≤ x ≤ c | 1 | x ≥ b |
|  |  | (d − x)/(d − c) | c < x < d |  |  |
|  |  | 0 | x ≥ d |  |  |