Source: https://www.quantumsteeldesign.com/revision-impact/ Your browser. Your workspace. # Revision Impact Report Compare two saved steel takeoff revisions, inspect connected records, and record explicit cost and duration adjustments with separate review and confirmed statuses. ## Carry a changed mark into a documented impact review A quantity or length difference starts a review; it does not establish a purchase change, rework instruction, or schedule delay. This report compares physical lengths in a common unit, shows related records, and lets you record the basis for your own cost and time estimates. Files and project data are processed in your browser. Nothing is uploaded. A coordination review is a snapshot: source tools are never changed, and fresh source changes require a new snapshot. Save or export work you need to retain. ## Load your project records Saved projectChoose a project Include the currently saved global Assembly BOM in this project snapshot. I have checked that it belongs to this project. Start in [Project Workspaces](https://www.quantumsteeldesign.com/project-workspaces/) to create a project. Save takeoffs, drawing registers, and RFIs to it. Operations records use the same project identifier; purchasing uses an exact project name or reference match. Unsupported or unreadable individual sources are reported below. Open a coordination review JSON fileOpening a file replaces this tab's review after confirmation if there are unsaved edits. It never imports into the original project tools. ## No project loaded Before takeoffAfter takeoff The three coordination tools share one saved review. Save before moving between them. Export JSON before clearing browser storage. Concurrent changes in another tab block saving until you reload. ## Record an explicit mark association Use this when you have reviewed a drawing, order, assembly, or other record and established its relationship to a mark. A user-recorded link documents your choice; it is not third-party verification. ## Worked example: a beam changes after an order This fictional service platform has two B1 beams, each 20 feet long, in takeoff A. Takeoff B changes B1 to three beams, each 22 feet long, adds B2, and removes B3. PO-001 still shows two W12X26 pieces, and the shop batch still contains two B1 pieces. - Load the fictional example. In the explorer, search B1. Its drawing and order are explicitly linked. RFI-001 only matches the drawing reference, so its effect still needs review. - Open the impact report with takeoff A before takeoff B. The entered USD 875 and two-day adjustment for B1 are teaching assumptions. They stay outside confirmed totals until you choose a decision and apply the impact note. - Run the consistency checker. It flags the unmatched S999 RFI reference, mixed takeoff units, the B1 quantity difference, and the distinct A1 assembly mark for review. - Record the outcome, export the review, and make approved corrections in the original tools. Loading a fresh snapshot starts a new review without silently carrying decisions across changed input. [Download the fictional review JSON](https://www.quantumsteeldesign.com/downloads/coordination-example.json). The file can be inspected in a text editor before loading it. ### Troubleshooting If a mark is missing, check the selected project, save the source record, and load a fresh snapshot. If a drawing reference contains several numbers, review them separately: only an exact whole reference is matched automatically. If storage is blocked or full, keep working in memory and export JSON. A corrupted stored review is preserved instead of overwritten. ## Common questions Does this calculate engineering or fabrication cost automatically? No. The report identifies takeoff differences and linked records. Enter a cost adjustment and its basis yourself. Confirmed amounts are totaled separately by currency; no currency conversion is performed. Why are duration adjustments not totaled? Two changes may happen in parallel, affect the same activity, or depend on other work. Adding every duration would imply a schedule calculation that this tool does not perform. Review each duration against your actual programme. Why does a changed or ambiguous mark need review again? Annotations belong to the selected revision pair and exact before/after values. A changed input does not inherit an earlier approval. Duplicate or blank marks remain ambiguous and cannot contribute to confirmed cost totals. ## Continue your project review [Piece mark explorer](https://www.quantumsteeldesign.com/piece-mark-explorer/) ? [Revision impact report](https://www.quantumsteeldesign.com/revision-impact/) ? [Project consistency checker](https://www.quantumsteeldesign.com/project-consistency/) ? [Drawing register](https://www.quantumsteeldesign.com/drawing-register/) ? [RFI log](https://www.quantumsteeldesign.com/rfi-log/) ? [Purchasing and receiving](https://www.quantumsteeldesign.com/purchasing-receiving/)