PSTD-019

Pack: F_OVERLAY Severity: major

Hygienic-zone geometry must minimize crevices and inaccessible joints

Rule Card

Field	Value
Pack	F_OVERLAY — Industry Overlay and Compliance
Title	Hygienic-zone geometry must minimize crevices and inaccessible joints
Severity	major
Check logic	Hybrid
Applies to	Compliance overlay
Inputs required	geometry_features
Fix template	Redesign joints to eliminate crevices (e.g., continuous/sealed welds, hygienic fasteners, open access) and ensure surfaces are accessible for cleaning/inspection.

Short Description

Checks for narrow gaps/crevices and inaccessible joints in hygienic zones as a proxy for meeting ISO 14159 hygienic design intent.

When It Applies

This rule runs only when an overlay activates F_OVERLAY. It targets Compliance overlay.

Evidence Profile

Input	Category
geometry_features	Geometry

References

Reference	Type	Title
REF-FOOD-ISO	standard	EN ISO 14159 (ISO 14159:2002; EN adoption 2008) — Safety of machinery — Hygiene requirements for the design of machinery

Compiled Threshold Metadata

Field	Value
compiled_from	pilot_deep_research
source_rule_id	PILOTSTD-019
source_analysis_mode	geometry_dfm
source_standard_clause	None
source_predicate	{'left': 'cad.hygienic_design.crevice_count', 'op': '==', 'right': 0}
source_evaluator_hint	Detect gaps below a configurable threshold and inaccessible joints in tagged hygienic zones; require zone tagging if absent.
source_pilot_sets	['SET_B_FOOD_PILOT']
source_evidence_quality	official_abstract
source_needs_manual_confirmation	True
source_inputs	['cad.hygienic_design.crevice_count']
compiled_inputs	['geometry_features']
unknown_source_inputs	[]
compile_status	executable_now

Sources

• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\manifest.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\rule_library.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\references.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\process_classifier.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\overlays.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\roles.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\report_templates.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\ui_bindings.json