CSI MasterFormat Divisions 09 through 12 cover the building components that occupants see, touch, and interact with every day. Division 09 (Finishes) addresses plaster, gypsum board, tile, flooring, ceilings, painting, and wall coverings. Division 10 (Specialties) covers items like signage, toilet accessories, lockers, fire extinguisher cabinets, and operable partitions. Division 11 (Equipment) handles built-in items such as kitchen equipment, laboratory casework, and laundry systems. Division 12 (Furnishings) specifies casework, window treatments, seating, and other movable or fixed furniture.

For the PDD exam, you need to know which CSI division covers a given product, how to choose the right specification type for each product category, and how these specifications coordinate with finish schedules, door hardware schedules, and room finish designations on the drawings. These four divisions sit at the intersection of design intent and construction execution. Getting the specification wrong for a ceiling tile or a piece of built-in equipment can cascade into coordination conflicts with mechanical systems above the ceiling, fire-rated assemblies at partition heads, or accessibility clearances at restroom accessories.

The ARE tests whether you can identify the correct specification section for a given product, select between proprietary, performance, and descriptive specification approaches, and recognize which ASTM or industry standards govern acceptance testing. You won't be asked to memorize section numbers, but you will need to understand the organizational logic and know how specification decisions affect constructability, cost, and quality.