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SHEET 03How it worksSeven stages

From drawing to tender.

Seven stages, each one a real transformation of a real sheet. The machine does the repetitive observation; the engineer takes responsibility; rules do the arithmetic nobody should be doing by hand at midnight.

  1. 01

    Ingest

    A sheet arrives as a PDF or a DWG, at whatever scale the consultant plotted it. It is registered against the project from its own title block — drawing number, revision, level, discipline — so that when Revision D lands it knows what it supersedes. Nothing in the drawing body is read yet.

    Source
    E-L02-ELV-001.pdf
    Decision
    Title block read, sheet registered against the project
    Result
    Rev C · level 02 · 1:100 @ A1
    ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRYPROJECTAI AGENTIVA HQDRAWINGE-L02-ELV-001REVCSCALE1:100 @ A1LEVEL02
    • 02

      Read

      The sheet is understood before anything is counted. Layers are separated so services can be told from architecture, the plotted scale is confirmed against a known dimension rather than trusted, and the project legend is parsed — because the same triangle is a different device on the next job.

      Source
      Sheet body + legend block
      Decision
      Legend parsed, layers separated, scale confirmed
      Result
      11 symbol definitions · 1:100 verified
      ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRYLEGEND — ELVCCTVFIXED CAMERACRCARD READERDCDOOR CONTACTDOTWIN RJ45SPCEILING SPEAKER21.4 m — CONFIRMS 1:100
      E-L02-ELV-001Level 02 — legend and scale
      0510m
      • 03

        Detect

        Symbols are matched against this project’s legend and proposed as observations. Each carries a location, the evidence it was matched on, and a single ring on a dashed leader — the notation for a claim nobody owns yet. None of this is a quantity.

        Source
        11 symbol definitions
        Decision
        Symbols matched across the sheet
        Result
        47 observations, none owned
        ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRY
        CCTV-021Corridor cameraDetected
        E-L02-ELV-001Level 02 — machine observation
        0510m
        • CCTV-014: External WP camera — Detected — grid A/1
        • CCTV-021: Corridor camera — Detected — grid C/2
        • ACS-CR-06: Proximity reader, door 02-06 — Detected — grid B/1
        • ACS-DC-06: Door contact, door 02-06 — Detected — grid B/1
        • ACS-PB-06: Exit push button, door 02-06 — Detected — grid B/1
        • BGM-SP-208: Ceiling loudspeaker, 6W — Detected — grid A/2
        • ICT-DO-112: Twin RJ45 outlet, desk 12 — Detected — grid A/2
        • ICT-DO-118: Twin RJ45 outlet, desk 18 — Detected — grid B/2
        • ICT-RK-01: ELV riser rack, 42U — Detected — grid C/3
        • ICOM-02: Lift lobby door station — Detected — grid C/2
      • 04

        Verify

        An engineer works the sheet — confirming, correcting, rejecting, and adding what the system missed. A confirmed observation takes the second ring and a solid leader. This is the step that converts a machine’s opinion into a person’s responsibility, and it is the one the product will not skip.

        Source
        47 observations
        Decision
        Engineer confirms, corrects, rejects
        Result
        44 verified · 2 corrected · 1 rejected
        ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRY
        ICT-DO-118Twin RJ45 outlet, desk 18Detected
        E-L02-ELV-001Level 02 — engineer verification
        0510m
        • CCTV-014: External WP camera — Verified — grid A/1
        • CCTV-021: Corridor camera — Verified — grid C/2
        • ACS-CR-06: Proximity reader, door 02-06 — Verified — grid B/1
        • ACS-DC-06: Door contact, door 02-06 — Verified — grid B/1
        • ACS-PB-06: Exit push button, door 02-06 — Verified — grid B/1
        • BGM-SP-208: Ceiling loudspeaker, 6W — Verified — grid A/2
        • ICT-DO-112: Twin RJ45 outlet, desk 12 — Verified — grid A/2
        • ICT-DO-118: Twin RJ45 outlet, desk 18 — Detected — grid B/2
        • ICT-RK-01: ELV riser rack, 42U — Verified — grid C/3
        • ICOM-02: Lift lobby door station — Verified — grid C/2
      • 05

        Quantify

        Engineering rules turn verified observations into quantities. A door becomes five devices. Outlets aggregate into ports, patch panels and switch capacity. A lane width selects a boom length. Every derived number keeps a link to the rule that produced it and the observation it started from.

        Source
        Verified observations
        Decision
        Engineering rules applied per system
        Result
        Quantities, each with its derivation attached
        ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRYCCTV-014CCTV-021ACS-CR-06ACS-DC-06ACS-PB-06BGM-SP-208ICT-DO-112ICT-DO-118ICT-RK-01ICOM-02
        ACS-CR-06Proximity reader, door 02-06Verified
        E-L02-ELV-001Level 02 — derived quantities
        0510m
        • CCTV-014: External WP camera — Verified — grid A/1
        • CCTV-021: Corridor camera — Verified — grid C/2
        • ACS-CR-06: Proximity reader, door 02-06 — Verified — grid B/1
        • ACS-DC-06: Door contact, door 02-06 — Verified — grid B/1
        • ACS-PB-06: Exit push button, door 02-06 — Verified — grid B/1
        • BGM-SP-208: Ceiling loudspeaker, 6W — Verified — grid A/2
        • ICT-DO-112: Twin RJ45 outlet, desk 12 — Verified — grid A/2
        • ICT-DO-118: Twin RJ45 outlet, desk 18 — Verified — grid B/2
        • ICT-RK-01: ELV riser rack, 42U — Verified — grid C/3
        • ICOM-02: Lift lobby door station — Verified — grid C/2
      • 06

        QA

        Checks run across documents, not within one. A plan count that disagrees with its schedule. A device outside every zone. A room with power and no data. A quantity that moved between revisions without a cloud to explain it. Each becomes a query on the drawing, addressed to a person.

        Source
        Quantities + schedules + revision history
        Decision
        Cross-document checks run
        Result
        3 queries raised · 0 silently resolved
        ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRYQ
        ICT-DO-118Twin RJ45 outlet, desk 18Flagged
        E-L02-ELV-001Level 02 — QA queries
        0510m
        • CCTV-014: External WP camera — Verified — grid A/1
        • CCTV-021: Corridor camera — Verified — grid C/2
        • ACS-CR-06: Proximity reader, door 02-06 — Verified — grid B/1
        • ACS-DC-06: Door contact, door 02-06 — Verified — grid B/1
        • ACS-PB-06: Exit push button, door 02-06 — Verified — grid B/1
        • BGM-SP-208: Ceiling loudspeaker, 6W — Verified — grid A/2
        • ICT-DO-112: Twin RJ45 outlet, desk 12 — Verified — grid A/2
        • ICT-DO-118: Twin RJ45 outlet, desk 18 — Flagged — grid B/2
        • ICT-RK-01: ELV riser rack, 42U — Verified — grid C/3
        • ICOM-02: Lift lobby door station — Verified — grid C/2
      • 07

        BOQ

        Approved quantities — and only approved quantities — are released to pricing. The BOQ is not the end of the audit trail; it is the top of it. Any line opens backwards through the rule that derived it, the engineer who approved it, and the exact place on the sheet it came from.

        Source
        Approved quantities
        Decision
        Released to pricing
        Result
        A BOQ where every line opens backwards
        ABCD123OFFICE 02.01OFFICE 02.02OFFICE 02.03MEETING 02.04STORECORRIDOR 02.C1OPEN OFFICE 02.10LIFT LOBBYSTAIR 02ELV RISERMEETING 02.11PANTRY
        CCTV-014External WP cameraVerified
        BOQ line 04.10.021Approved
        External WP camera, ceiling mounted04 No.
        Opens back to E-L02-ELV-001 · grid A/1 · verified by engineer
        E-L02-ELV-001Level 02 — approved for pricing
        0510m
        • CCTV-014: External WP camera — Verified — grid A/1
        • CCTV-021: Corridor camera — Verified — grid C/2
        • ACS-CR-06: Proximity reader, door 02-06 — Verified — grid B/1
        • ACS-DC-06: Door contact, door 02-06 — Verified — grid B/1
        • ACS-PB-06: Exit push button, door 02-06 — Verified — grid B/1
        • BGM-SP-208: Ceiling loudspeaker, 6W — Verified — grid A/2
        • ICT-DO-112: Twin RJ45 outlet, desk 12 — Verified — grid A/2
        • ICT-DO-118: Twin RJ45 outlet, desk 18 — Verified — grid B/2
        • ICT-RK-01: ELV riser rack, 42U — Verified — grid C/3
        • ICOM-02: Lift lobby door station — Verified — grid C/2

      Seven stages, and a person is accountable at every one.

      Nothing in this pipeline produces a number that cannot be opened. Ingest records which revision a quantity belongs to. Read records what a symbol was taken to mean. Detect records what was observed and on what evidence. Verify records who confirmed it. Quantify records which rule ran. QA records what was questioned and who answered. BOQ records what was approved, and by whom.

      That is what makes the output defensible in a tender review — not the detection, which is only the first stage of seven.

      Bring a drawingSee the systems