How long is my form taking?
USCIS publishes a range per form and per office. Both matter — the same form can differ by months depending on where it is being handled.
Forms decided at a local field office, where which office you are assigned to changes the answer by months.
I-956F — Application for Approval of an Investment in a Commercial Enterprise
11.5 to 15 months
Immigrant Investor Program Office
Estimated median
10.3 months
The published range is the slow tail, not the middle: USCIS's low figure is where about 80% of cases have finished and the high figure about 93%. So half of cases finish sooner than 10.3 months — three in four by 11.3, nine in ten by 14.7. An estimate from those two published anchors, not a figure USCIS publishes.
Ranges are as published by USCIS: the low figure is where about 80% of cases have finished and the high figure about 93%. Confirm on Check on USCIS's processing times page.