What’s the difference between nested and parallel branches?

Nested branches create hierarchical decision structures:

First decision leads to second decision. Decisions build on previous decisions. Creates tree structure: Is customer VIP? If yes, did they purchase recently? If no, are they at risk?

Parallel branches run simultaneously:

Multiple paths execute at the same time. Different purposes, not sequential decisions. Example: Send email AND update CRM AND trigger webhook.

When to use nested: Decisions depend on previous decisions. Narrowing down to specific scenarios. Progressive qualification or filtering.

When to use parallel: Independent actions should happen simultaneously. Different systems need notification. Multiple outputs from single trigger.

Complexity management: Deep nesting becomes hard to follow. Parallel branches add system integration complexity. Balance sophistication with maintainability.

Nested goes deeper. Parallel goes wider. Both have roles in comprehensive automation.