Cross-Document Verification
HAZOP Prep in Hours, Not Weeks

Cross-document verification is the engineering discipline of checking that the same physical asset (instrument, equipment, line, valve) is described consistently across all the documents that reference it: P&ID, datasheet, line list, equipment list, instrument index, isometric, vendor data book. Inconsistencies are common in EPC projects (different engineers update different documents at different times); they surface as rework cost, HAZOP-prep delays, construction errors, and owner-operator handover disputes. Pathnovo automates the cross-document check across 5+ document layers simultaneously with structured discrepancy report output.

Manual cross-document review by senior engineers takes 4-8 weeks for a typical $50M-capex unit and routinely catches 60-80% of discrepancies (depending on engineer experience and time pressure). Pathnovo automates the same review in 48 hours at 99.5% measured accuracy on tag reconciliation and 99% on discrepancy detection. The structured output (severity-scored, sortable, with bounding-box source evidence) is ready for engineering review meeting; manual review output is typically a marked-up PDF or an ad-hoc Excel that requires further structuring before any meeting.

Yes, this is the core capability. Pathnovo extracts every parameter from each instrument datasheet (design pressure, design temperature, range, set points, calibration data, SIL classification, service description, materials, vendor specifications), then cross-references against the P&ID's representation of the same instrument tag. Discrepancies (e.g. P&ID shows control valve, datasheet specifies manual valve; or P&ID shows 6-inch line, datasheet specifies 4-inch transmitter on 6-inch line) flagged with code clause references where applicable.

48 hours for a typical project document set (50-100 P&IDs + datasheets + line list + equipment list + instrument index for a $50M-capex unit). Larger projects (500+ P&IDs at multi-unit scale) typically run 1-2 weeks. Manual cross-document review at the same scale runs 4-8 weeks for senior engineers. Pathnovo's per-deliverable SLA is contractual.

HAZOP (Hazard and Operability Study) is the structured safety review where engineers systematically analyse process deviations and their consequences. HAZOP requires consistent input documents: if the P&ID, datasheet, and line list disagree on basic facts (line size, design pressure, equipment type), the HAZOP facilitator wastes session time reconciling document inconsistencies instead of analysing safety risks. Pathnovo's cross-document verification cleans up the document set before HAZOP starts, so the HAZOP facilitator focuses on safety analysis and the HAZOP study completes faster with higher-quality output.

Alomana is a cross-document review point tool focused on a narrower scope of document types and lacks the EPC-vertical depth (15+ document types, ISA 5.1 native, Indian regulatory layer, named-customer benchmarks) that Pathnovo provides. Alomana also lacks the productised SLA + transparent pricing + free pilot model that Pathnovo offers. For buyers researching cross-document review specifically, Alomana is the point tool; Pathnovo is the integrated EPC vertical solution that includes cross-document verification as one workflow within a broader procurement intelligence + AIM + compliance chain.

IntuigenceAI's product lets users ask conversational questions about engineering documents ('does PT-101 datasheet match the P&ID?'). Pathnovo's product produces a structured discrepancy report at scale across the full project document set without per-question manual interrogation. Different use cases: NLP Q&A for ad-hoc engineer query during design review; structured cross-document report for HAZOP-prep gate or owner-operator handover gate. Most EPC + owner-operator engagements need the structured report (NLP Q&A is optional via downstream tools like Cognite or AVEVA AIM operating on structured data).

C&E (Cause and Effect) matrices encode SIS (Safety Instrumented System) logic: which input conditions trigger which outputs. C&E vs P&ID verification is the SIS-specific layer of cross-document verification: every C&E matrix row cross-checked against the current P&ID for instrument loop tagging, signal direction, and control logic consistency. Excel S6 #6 ranks C&E vs P&ID as a ZERO-competition workflow. See /solutions/c-and-e-vs-pid-verification (when published as separate cluster page) for the SIS-focused depth.