Doors & Hardware AI · Addendum & revision comparison
Addendum 2 changed something. Here's the list.
When a revised drawing set or addendum lands days before the bid, the question isn't whether something changed — it's what, where, and what it does to your number. FastBid24 compares the revised package against the previous version opening by opening and hands the estimator a change list instead of a re-read.
What the comparison reports
Doors added, removed, changed — and what the changes touch.
- Openings added or removed between versions
- Field-level changes per opening — previous value and revised value, side by side
- Hardware-set reassignments (an opening moved from one set to another)
- Hardware-set content changes — items added, items removed, quantities changed
- Every opening affected by a set-content change, listed for re-pricing
- New conflicts introduced by the revision, flagged by the same reconciliation pass that checks every package
Tracked per opening
For every opening present in both versions, each of these fields is compared and reported with the previous and revised value side by side:
A worked example
Door 214A — 2 changes
fire rating 45 min → 90 min
hardware set HW-05 → HW-11
+ 3 openings affected by HW-11 content change
Illustrative rendering of the comparison output format — field, previous value, revised value, and the ripple through the hardware-set mapping.
Why field-level beats page-level
Re-price what moved
A rating change moves the door, the frame and the hardware set. The comparison names every opening a set change touches, so nothing gets re-priced twice — or missed.
Defend the delta
“Addendum 2 changed 6 openings and 2 hardware sets” is a sentence you can put in front of a GC. A pile of clouded sheets isn't.
Same verification bar
Revised packages run through the same reconciliation and estimator review as the original — new conflicts introduced by the revision get flagged, not inherited.
Put your last addendum through it.
Send the original package and the revision. You'll get the takeoff plus the change list — openings added, removed and changed, with previous and revised values. First project free for qualified Division 8 packages.