Randomly select spaces to be audited, and ensure that each space type is sufficiently represented. APPA requires that you audit a number of rooms equivalent to at least 10% of each space type, and at least 10% of the total floor area of each space type. For any space types with fewer than five rooms, include all five rooms in the audit. (See the APPA Audit Form in the Documentation Toolkit, second tab, “roster of audit spaces” to help you figure out if the rooms you've selected collectively meet the requirements listed above.)