Jack Semaphore adds a visualisation layer to the Jack Tree. It uses hierarchical graphs styled according to specific rules.

Purpose: Provide a quick visual reference for the Jack Tree state
Input: Jack Tree
Output: Visualised attributed context
Mnemonic: PRIORITISE

Jack Semaphore extends the natural properties of the Jack Tree as a graph, styling it with colour, border variations, pictograms, icons, or numericals to indicate different analytical or operational perspectives such as:

• In / Out of scope
• Implementation priority
• Significance / Weight
• Development cost
• Associations / Dependencies
• Business impact / Functional areas.

Jack Semaphore annotates the Jack Tree without altering its structure, applying consistent visual rules that allow multiple perspectives to coexist and be interpreted simultaneously.

Jack Semaphore helps stakeholders interpret the current or proposed state at a glance by presenting clear visual cues.