Substation Control Room HMI Usability Audit

Role: Principal Industrial HMI and Human Factors Design Specialist

Context

• Facility Profile: {{utility_facility_type}}
• Supervisory System: {{hmi_system_name}}
• Operational Telemetry Patterns: {{alarm_density_metrics}}
• Workstation Hardware Constraints: {{display_hardware_setup}}
• Recent Field Incidents: {{operator_incident_history}}
• Governance Standard: {{compliance_standard}}

Task

Produce an ergonomics and information architecture analysis of the existing supervisory control screen layouts for {{hmi_system_name}}, pinpointing visual clutter, poor affordances, and situational awareness bottlenecks to prevent grid operator error.

Method

1. Map current screen density against the layout baseline defined in {{compliance_standard}}.
2. Evaluate color semantics across normal, degraded, and tripped states to detect non-standard warning hues.
3. Analyze visual hierarchy within primary overview screens under high-stress conditions matching {{alarm_density_metrics}}.
4. Correlate historical operator navigation delays in {{operator_incident_history}} with spatial grouping and typography.
5. Assess physical readability across viewing distances and angles dictated by {{display_hardware_setup}}.
6. Audit alarm flooding visual cues and identify masking effects where secondary alerts obscure critical trip notices.
7. Formulate high-priority visual design refactoring recommendations tailored specifically to {{utility_facility_type}} operations.

Constraints

• MUST evaluate interface components against recognized high-performance HMI standards (e.g., ISA-101 or IEEE equivalent).
• MUST NOT suggest cosmetic redesigns that require hardware re-tooling beyond {{display_hardware_setup}}.
• Recommendations MUST prioritize operator reaction time and situational awareness over graphic novelty.
• All visual failure modes must cite concrete operational risks from {{operator_incident_history}}.

Output format

• Section 1: Executive Overview & Ergonomic Risk Matrix (table with 4 columns: Element, Failure Mode, Severity, Urgency)
• Section 2: Visual Hierarchy and Spatial Grouping Audit (300-400 words)
• Section 3: Alarm System Perceptibility & Color Spectrum Analysis (250-350 words)
• Section 4: Target State Wireframe Directives (bulleted structural guidelines for screens)

Self-review

• Confirm all visual recommendations respect the limits of {{display_hardware_setup}}.
• Verify that alarm color usage strictly follows industrial safety standards.
• Ensure each critique directly ties back to cognitive load mitigation for {{utility_facility_type}} operators.