System Structure Navigator

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Overview

SYSTEM: Top-level system (e.g., AEB System)
├── SUBSYSTEM: Intermediate decomposition level
│   ├── COMPONENT: Leaf-level design elements
│   └── COMPONENT: Leaf-level design elements
└── SUBSYSTEM: Additional subsystems
    ├── COMPONENT: Design element
    └── COMPONENT: Design element

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Report Structure

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System Element Hierarchy Levels

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Column Structure

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Report Layout

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System-Level Summary Card

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Hierarchical Tree Section

SYSTEM: AEB System
├─ Subsystem: Sensor Housing Subsystem
│  ├─ Component: Sensor Housing Assembly      [18 FM] [16 RC]
│  ├─ Component: Camera Module                [24 FM] [19 RC]
│  └─ Component: Radar Module                 [18 FM] [15 RC]
├─ Subsystem: ECU Processing Subsystem
│  ├─ Component: System-on-Chip (SoC)         [22 FM] [18 RC]
│  ├─ Component: Safety Co-Processor          [7 FM]  [6 RC]
│  ├─ Component: Memory (Flash/RAM)           [12 FM] [10 RC]
│  └─ Component: Power Management IC          [11 FM] [9 RC]
└─ Subsystem: Vehicle Interface Subsystem
   └─ Component: CAN Transceivers             [19 FM] [15 RC]

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Gap Analysis Sections

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Components Without DFMEA

• Memory (Flash/RAM) — No DFMEA module assigned → [Create DFMEA]

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Components Missing Functions

• CAN Transceivers — 0 functions allocated → [Allocate Functions]

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Components Missing Characteristics

• (none)

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Unfinished FMEA Analyses

• Memory (Flash/RAM) — 87% FMEA coverage (7/8 failure modes assessed) → [View Incomplete FMs]

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Technical Implementation

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Data Sources

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Velocity Macros Used

#import('nextedy_solutions.vm')
#nxInit()

## Macro: nxSystemElementTree(systemElement, indent)
## Recursively renders system element hierarchy with children
#macro(nxSystemElementTree $element $indent)
  #set($children = $element.linkedWorkItems().forward('children', 'systemElement'))
  <tr style="background-color: #{'#ffffff' if $indent % 2 == 0 else '#f5f5f5'};">
    <td style="padding-left: ${indent * 20}px;">
      <strong>$element.title</strong>
    </td>
    <td>#nxStatCount("type:function AND linkedWorkItems:allocatedTo.back()=$element.id")</td>
    <td>#nxStatCount("type:characteristic AND linkedWorkItems:allocatedTo.back()=$element.id")</td>
    <td>#nxLinkCoverage($element, "failureMode", "assesses", "forward")</td>
    <td>
      #if($element.fields().elementType().text() == 'component')
        #set($dfmea = $element.linkedWorkItems().forward('hasDfmea', 'module'))
        #if($dfmea)
          <a href="/automotive/polarion/#/project/$projectId/wiki/$dfmea.name">View DFMEA</a>
        #else
          <span style="color: red;">⚠ No DFMEA</span>
        #end
      #end
    </td>
  </tr>
  #foreach($child in $children)
    #nxSystemElementTree($child, $indent + 1)
  #end
#end

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Coverage Calculations

Covered = COUNT(function WHERE linkedWorkItems.allocatedTo.back = element)
Total = COUNT(function WHERE linkedWorkItems.allocatedTo.back IN (element OR siblings))
Coverage % = Covered / Total * 100

Covered = COUNT(failureMode WHERE module = element.dfmeaModule AND postmitigationAP IS NOT NULL)
Total = COUNT(failureMode WHERE module = element.dfmeaModule)
Coverage % = Covered / Total * 100

Covered = COUNT(riskControl WHERE backlinkedWorkItems.mitigates.back.postmitigationAP < 'H')
Total = COUNT(failureMode WHERE module = element.dfmeaModule AND postmitigationAP = 'H')
Effectiveness % = Covered / Total * 100

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Navigation and Integration

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Links to Related Documentation

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Drill-Down Actions

• Function count → Opens Subsystem Functions Sheet filtered to this element
• Characteristic count → Opens Characteristics PowerSheet filtered to this element
• Failure mode count → Opens the Design FMEA Risksheet for this component (design space)
• Risk control count → Executes Lucene query: type:riskControl AND backlinkedWorkItems:mitigates:falureMode.module=<DFMEA>
• Coverage status (🔴 red) → Opens FMEA module with filter showing incomplete failure modes

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Interpretation Guide

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Green Status (🟢 ≥90% Coverage)

• All functions allocated and characteristics defined
• ≥90% of failure modes have post-mitigation assessment
• Risk controls assigned to all high-priority failure modes
• Action: Monitor for new requirements; conduct periodic reviews per Risk Control Effectiveness Report

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Yellow Status (🟡 70–89% Coverage)

• Some functions/characteristics missing OR some failure modes lack post-mitigation assessment
• Action: Complete FMEA assessment per FMEA Workflow; allocate missing design parameters per Characteristics How-To

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Red Status (🔴 <70% Coverage)

• Significant gaps in function allocation, characteristic definition, or FMEA completion
• Action: Prioritize element completion; escalate to design team; see Traceability Gap Resolution

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Gray Status (⚪ No DFMEA Module)

• Component lacks an assigned Design FMEA Risksheet module
• Action: Create new DFMEA document per Create DFMEA Document

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Standards Compliance

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Common Tasks

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Validate System Completeness

1. Open System Structure Navigator
2. Review system-level summary card: confirm 100% function and characteristic allocation
3. Scroll through tree; look for ⚪ gray status (missing DFMEA modules)
4. Click red-status components; examine gaps in “Components Missing Functions” section
5. Create missing FMEAs or allocate missing design parameters as needed

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Prepare for Design Freeze

1. Filter to components with 🟡 yellow status
2. Complete all FMEA post-mitigation assessments per Track Post-Mitigation Ratings
3. Verify all risk controls have linked test cases per Link Tests to Requirements
4. Confirm all components show 🟢 green (≥90% coverage)

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Generate Audit Report

1. Take screenshot of System Structure Navigator
2. Export system-level summary card to PDF
3. Document any red/yellow status components as open items
4. Cross-reference with Safety Readiness Scorecard for standards-specific readiness metrics

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Related Reports

• Data Model Diagram — ER diagram showing systemElement relationships
• Requirements Traceability Report — V-model traceability across all levels
• System DFMEA Report — Executive FMEA summary by component
• Risk Control Effectiveness Report — Risk mitigation validation