A takedown schedule gets written when the land is tied up, against a pro forma that assumed an absorption rate. The absorption rate changes. The schedule usually does not.
Holding land under option is the low-carry position. Taking a lot down converts an option fee into a carried asset, and the difference compounds every month the lot waits for a start.
The other direction costs more per event and happens less often. An option expiry passes, the land gets re-struck at market, and 128 lots a year come back nearly ten thousand dollars higher. Some of that is the market. Some of it is a calendar nobody was watching.
The model drives takedown from the forward start schedule rather than from the original pro forma, puts every expiry on a calendar with an alert in front of it, and tests the next option's structure against your own absorption record.
Lots taken down ahead of the start that consumes them. Option fee converted to carried asset.
An expiry that passed, re-struck at market. Part administrative failure, part market movement.
Capital committed against a takedown schedule the absorption record does not support.
Taken down, then held waiting on servicing. Priced by the lot delivery model and credited there.
The rest of this model — the data sets it runs on, the cause split, the working behind the reference figure and a sample output — goes out by email. Two fields, nothing else.