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Developing and Coding Project Networks

A network diagram represents the logical sequence of project activities.

It forms the backbone of modern scheduling tools like Primavera, MS Project, and Orangescrum Work Planner.

1. Types of Network Diagrams

  • Activity-on-Arrow (AOA) – Older format; uses arrows to represent activities.
  • Activity-on-Node (AON) – Commonly used today; activities represented by boxes (nodes) linked by arrows.

Example (AON Format):

Start → Foundation → Columns → Slabs → Finishes → Handover

2. Activity Coding

Activity coding helps organize, filter, and analyze schedule data efficiently.

Coding Categories:

Developing and Coding Project Networks

Best Practices:

  • Maintain consistent naming conventions.
  • Align activity codes with WBS and cost codes.
  • Use logical dependencies (Finish–Start, Start–Start, etc.).
  • Include milestones for tracking approvals, procurement, and inspections.
“A well-coded network turns thousands of activities into a manageable model.”