Process Modeling and Automation
Core concepts
Know the process model building blocks: start/end events, user input tasks, service tasks (script, integration, data write), gateways (exclusive, parallel, inclusive), subprocesses, and timer events. Understand process variables and their parameterization (private vs. process vs. rule input), and how node inputs/outputs map data between nodes.
Execution semantics
Be clear on exclusive gateway (one path) vs parallel gateway (all paths, then join) vs inclusive gateway (all true conditions). Understand error handling via boundary events, exception flows, and escalation. Know process instance priority, assignment (to user, group, or expression), and task deadlines/escalations.
Traps
- Assuming a parallel gateway join waits for all branches - it does, but only branches actually activated.
- Forgetting that an inclusive gateway can activate multiple paths, complicating joins.
- Confusing process variable scope with node input scope.
- Missing that timer events depend on process calendar/business hours.
Worked example
A process must wait for two parallel approvals before continuing. Model a parallel gateway split, two user input tasks, then a parallel gateway join - the join proceeds only when both tasks complete. If either can be skipped, use an inclusive gateway so the join matches activated branches.