Simultaneous Process Mining of Process Events and Operator Actions for Alarm Management

Figure 8

Heuristic nets of alarm propagation between production units. CH: isostripper, propane-depleting, and propane handling unit; U1: utility streams; AC: reactor and acid generating unit; FD: raw material and drying unit. (a) Minimum activity count = 100. (b) Minimum activity count = 500.

(a)

(b)