PHASE Templates

This page provides lightweight templates for conducting a PHASE analysis.

You can copy these tables into a document, spreadsheet, or repository issue template.

Template 1: Analysis Purpose

Field Description
AI system name  
Domain  
Intended use  
Stakeholders  
System boundary  
Analyst(s)  
Date  

Template 2: Losses

Loss ID Loss description Loss type Affected stakeholder(s)
L1   Safety-critical / Performance-related / Sociotechnical  
L2   Safety-critical / Performance-related / Sociotechnical  
L3   Safety-critical / Performance-related / Sociotechnical  

Template 3: Hazards

Hazard ID Hazard description Related loss(es) System boundary
H1      
H2      
H3      

Template 4: Control Diagram Elements

Element Role Description
Controller    
Controlled process    
Control action    
Feedback    
Input    
Output    
Process model    
Control algorithm    

Template 5: Unsafe Control Actions

UCA ID Controller Control action Unsafe type Context Related hazard
UCA1     Provided when unsafe / Not provided when needed / Too early or too late / Stopped too soon or applied too long    
UCA2     Provided when unsafe / Not provided when needed / Too early or too late / Stopped too soon or applied too long    

Template 6: Loss Scenarios

Scenario ID Related UCA Loss scenario Causal factor Possible mitigation
LS1     Missing feedback loop / Incorrect process model / Technical malfunction / Emerging capability / Coordination issue  
LS2     Missing feedback loop / Incorrect process model / Technical malfunction / Emerging capability / Coordination issue  

Template 7: Mitigation and Monitoring Plan

Hazard or scenario Mitigation Owner Monitoring method Review frequency
         
         

Suggested Workflow

  1. Define the AI system and system boundary.
  2. Identify losses.
  3. Identify hazards.
  4. Draw the control diagram.
  5. Identify unsafe control actions.
  6. Identify loss scenarios.
  7. Define mitigations.
  8. Assign accountability.
  9. Revisit the analysis as the system changes.