feat(ai-sdk): interlocked-enclosure model — guard-open re-scoping of contact hazards

Class C (phase-aware, generic EN ISO 14120). A contact/entanglement hazard from a moving part is removed during NORMAL operation when the part is behind an interlocked guard; it remains only when the guard is open (maintenance/cleaning). - New HazardPattern.GuardableByEnclosure flag; set on HP096 (friction at rotating surfaces) and HP101 (entanglement of hair/clothing). - Narrative emits interlocked_enclosure for an interlocked door/hood. - pattern_enclosure.go: suppressedByEnclosure (drop in normal-op-only contexts) + guardedLifecycles (re-scope to maintenance/cleaning). - GT #3 gains the maintenance-phase entanglement/friction rows. Generic + regression-safe: machines that do not emit interlocked_enclosure are unaffected. GT #3 recall 80% -> 82.4%, one false positive removed (Aufwickeln). Kistenhub 97.1% and all 26 Bremse pinned mappings unchanged. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-24 22:13:34 +02:00
parent cf86dc241b
commit 5318a70f9e
6 changed files with 95 additions and 1 deletions
@@ -62,6 +62,13 @@ type HazardPattern struct {
 	// "hazard" = source only, "hazardous_situation" = person exposed, "harm" = injury.
 	// Empty = default (hazardous_situation).
 	GeneratedHazardType string `json:"generated_hazard_type,omitempty"`
+	// GuardableByEnclosure marks a contact/entanglement hazard that an interlocked
+	// enclosure removes during normal operation. When the project emits the
+	// "interlocked_enclosure" tag, such a pattern is re-scoped to maintenance/
+	// cleaning (guard open) and does NOT fire as a normal-operation hazard.
+	// Generic EN ISO 14120 logic — surfaced by the warewashing GT (the spray
+	// arm rotates behind the interlocked door).
+	GuardableByEnclosure bool `json:"guardable_by_enclosure,omitempty"`
 	// RequiredFailureModes restricts this pattern to fire only when at least one
 	// of the listed failure modes is relevant (by ComponentType match against project components).
 	// Empty/nil = fires regardless of failure modes (backwards compatible).
@@ -37,6 +37,7 @@ func GetDGUVExtendedPatterns() []HazardPattern {
 		},
 		{
 			ID: "HP096", NameDE: "Reibung/Abrieb durch rotierende Oberflaechen", NameEN: "Friction/abrasion by rotating surfaces",
+			GuardableByEnclosure:  true,
 			RequiredComponentTags: []string{"rotating_part"},
 			RequiredEnergyTags:    []string{},
 			GeneratedHazardCats:   []string{"mechanical_hazard"},
@@ -88,6 +89,7 @@ func GetDGUVExtendedPatterns() []HazardPattern {
 		},
 		{
 			ID: "HP101", NameDE: "Aufwickeln von Kleidung/Haaren", NameEN: "Winding up of clothing/hair",
+			GuardableByEnclosure:  true,
 			RequiredComponentTags: []string{"rotating_part"},
 			RequiredEnergyTags:    []string{"rotational"},
 			GeneratedHazardCats:   []string{"mechanical_hazard"},
@@ -201,6 +201,12 @@ func GetKeywordDictionary() []KeywordEntry {
 		{Keywords: []string{"lichtgitter", "lichtvorhang", "light curtain", "light grid"}, ComponentIDs: []string{"C102"}, ExtraTags: []string{"safety_device"}},
 		{Keywords: []string{"sicherheitsschalter", "safety switch"}, ComponentIDs: []string{"C104"}, ExtraTags: []string{"safety_device", "interlocked"}},
 		{Keywords: []string{"zuhaltung", "guard locking", "interlock"}, ComponentIDs: []string{"C105"}, ExtraTags: []string{"safety_device", "interlocked"}},
+		// interlocked_enclosure signals that moving parts are inaccessible behind a
+		// guard that is monitored/locked — feeds the GuardableByEnclosure re-scoping
+		// (contact/entanglement becomes a maintenance/guard-open hazard, not a
+		// normal-operation one). Emitted only by explicit "interlocked door/guard"
+		// vocabulary so it does not trigger for machines with exposed motion.
+		{Keywords: []string{"tuer mit sicherheitsschalter", "verriegelte tuer", "verriegelte haube", "verriegelte einhausung", "sicherheitstuer", "tuerverriegelung", "haube mit sicherheitsschalter"}, ExtraTags: []string{"interlocked_enclosure"}},
 		{Keywords: []string{"zweihand", "two-hand", "zweihandschaltung"}, ComponentIDs: []string{"C106"}, ExtraTags: []string{"safety_device", "two_hand_control_required"}},
 		{Keywords: []string{"schaltmatte", "safety mat"}, ComponentIDs: []string{"C108"}, ExtraTags: []string{"safety_device"}},
 		{Keywords: []string{"seilzug", "pull wire"}, ComponentIDs: []string{"C109"}, ExtraTags: []string{"safety_device"}},
@@ -0,0 +1,44 @@
+package iace
+
+// Interlocked-enclosure model (EN ISO 14120 / EN ISO 12100).
+//
+// A contact or entanglement hazard from a moving part is removed during NORMAL
+// operation when that part is inaccessible behind an interlocked guard. The
+// hazard then remains only when the guard is open — maintenance, cleaning or
+// fault clearing. Patterns flagged GuardableByEnclosure express this; a project
+// emits the "interlocked_enclosure" tag (interlocked door/hood, see
+// keyword_dictionary.go) to declare the guard.
+//
+// This is GENERIC: it applies to every enclosed machine (dishwasher spray arm,
+// enclosed mixer, centrifuge ...) and is regression-safe — machines that do not
+// emit interlocked_enclosure are unaffected.
+
+const (
+	phaseMaintenance   = "maintenance"
+	phaseCleaning      = "cleaning"
+	phaseFaultClearing = "fault_clearing"
+)
+
+// suppressedByEnclosure reports whether a guardable hazard must be dropped: the
+// part is enclosed AND none of the project's lifecycle phases opens the guard.
+func suppressedByEnclosure(p HazardPattern, tagSet map[string]bool, lifecycles []string) bool {
+	if !p.GuardableByEnclosure || !tagSet["interlocked_enclosure"] || len(lifecycles) == 0 {
+		return false
+	}
+	for _, lc := range lifecycles {
+		if lc == phaseMaintenance || lc == phaseCleaning || lc == phaseFaultClearing {
+			return false // guard is open in some phase → hazard remains there
+		}
+	}
+	return true
+}
+
+// guardedLifecycles re-scopes a guardable hazard to the guard-open phases when
+// the project declares an interlocked enclosure, so it is documented as a
+// maintenance/cleaning hazard rather than a normal-operation one.
+func guardedLifecycles(p HazardPattern, tagSet map[string]bool) []string {
+	if p.GuardableByEnclosure && tagSet["interlocked_enclosure"] {
+		return []string{phaseMaintenance, phaseCleaning}
+	}
+	return p.ApplicableLifecycles
+}
@@ -223,7 +223,7 @@ func (e *PatternEngine) Match(input MatchInput) *MatchOutput {
 			HumanRoles:          p.HumanRoles,
 			GeneratedHazardType: p.GeneratedHazardType,
 			MatchedFailureModes:  matchedFMs,
-			ApplicableLifecycles: p.ApplicableLifecycles,
+			ApplicableLifecycles: guardedLifecycles(p, tagSet),
 			SuggestedMeasureIDs:      p.SuggestedMeasureIDs,
 			ClarificationQuestionsDE: p.ClarificationQuestionsDE,
 			ISO12100Section:          p.ISO12100Section,
@@ -411,6 +411,11 @@ func patternMatches(p HazardPattern, tagSet map[string]bool, input MatchInput) b
 		}
 	}

+	// Interlocked-enclosure gate (guardable contact/entanglement). See pattern_enclosure.go.
+	if suppressedByEnclosure(p, tagSet, input.LifecyclePhases) {
+		return false
+	}
+
 	return true
 }

@@ -228,6 +228,36 @@
      "risk_out": {"f": 1, "w": 1, "p": 1, "s": 3, "r": 9},
      "norm_references": ["EN ISO 13849-1"],
      "sufficient": true
+    },
+    {
+      "nr": "4.4",
+      "hazard_group": "Mechanische Gefährdungen",
+      "hazard_group_applicable": true,
+      "hazard_type": "Erfassen/Aufwickeln an rotierenden Teilen bei geöffneter Schutztür",
+      "hazard_cause": "Bei geöffneter Tür im Wartungs- oder Reinigungsfall können lose Kleidung oder Haare an noch zugänglichen rotierenden Wellen erfasst und aufgewickelt werden",
+      "lifecycle_phases": ["Instandhaltung", "Reinigung"],
+      "component_zone": "Rotierende Wellen, Spülarm bei geöffneter Schutztür",
+      "risk_in": {"f": 1, "w": 1, "p": 2, "s": 3, "r": 12},
+      "measures": ["Rotation stoppt bei geöffneter Tür durch Verriegelung", "Warnhinweis"],
+      "measure_type": "KM",
+      "risk_out": {"f": 1, "w": 1, "p": 1, "s": 3, "r": 6},
+      "norm_references": ["EN ISO 14120"],
+      "sufficient": true
+    },
+    {
+      "nr": "4.5",
+      "hazard_group": "Mechanische Gefährdungen",
+      "hazard_group_applicable": true,
+      "hazard_type": "Reibung/Hautabschürfung an rotierenden Teilen bei geöffneter Schutztür",
+      "hazard_cause": "Berührung rotierender Wellen oder Oberflächen bei geöffneter Tür im Wartungsfall führt zu Hautabschürfungen durch Reibung",
+      "lifecycle_phases": ["Instandhaltung"],
+      "component_zone": "Rotierende Welle bei geöffneter Schutztür",
+      "risk_in": {"f": 1, "w": 1, "p": 2, "s": 2, "r": 8},
+      "measures": ["Rotation stoppt bei geöffneter Tür durch Verriegelung"],
+      "measure_type": "KM",
+      "risk_out": {"f": 1, "w": 1, "p": 1, "s": 2, "r": 4},
+      "norm_references": ["EN ISO 14120"],
+      "sufficient": true
    }
  ]
 }