FEMA samples the estimate. At least six of the ten largest cost items, and at least 25 percent of the rest, must each be within 10 percent of local weighted average unit prices or industry cost data. FEMA also checks that every activity has a unit cost (no lump sums), the right locality factors are applied, and every item is eligible. Failing items send the estimate back for revision.
Backup for your largest cost items, local weighted average unit prices or cost data references, the locality adjustment factors used, and escalation factors where you used historical costs.
Put your best backup behind the ten largest line items, since that is where FEMA looks hardest. If you used historical costs, add escalation and don’t also apply a locality factor; mixing the two is a common error the checklist catches.