Examples of precedence graphs.

Testing for conflict serializability

Directed and Edge-Weighted Graphs

Database Resource

Full article: A new MIP approach for balancing and scheduling of mixed model assembly lines with alternative precedence relations

Everything you need to know for this stupid databases exam, by Brandon Skerritt, Notes on Computer Science

Applied Sciences, Free Full-Text

The graph data model

PDF] Aweighted assembly precedence graph for assembly sequence planning

Critical Path Precedence Diagram, EdrawMax Editable Template

DB: How to draw a precedence graph (rules + 3 examples)