| Tier A | Fixed auditorium chairs with upholstered seat and back, writing tablet optional | 100 units | 25–35 days | Powder-coated cold-rolled steel frame | Fire-retardant fabric; molded foam seat cushion | Static seat load: 1,136 N minimum | ±2 mm for major structural dimensions | ≤1.5% | Incoming, in-process, final inspection and carton checklist | Preferred |
| Tier A | Retractable telescopic seating with automatic seat return | 80 units | 30–40 days | Reinforced steel structure with corrosion-resistant coating | High-density foam with replaceable upholstery panels | Seat mechanism cycle test: 10,000 cycles | ±2 mm for seat alignment | ≤2.0% | Mechanism-cycle report, packing inspection and final AQL report | Preferred |
| Tier B | Standard fixed seating for cinemas, lecture halls and training rooms | 150 units | 25–35 days | Welded steel side supports and beam-mounted frame | Polyester fabric; molded polyurethane foam | Static seat load: 1,000–1,136 N | ±3 mm for seat and armrest position | ≤3.0% | Final visual inspection and random carton inspection | Acceptable |
| Tier B | Auditorium chairs with cup holder, aisle-end panel and numbered seat plate | 200 units | 30–40 days | Powder-coated steel with molded plastic trim | Fabric or synthetic leather upholstery | Armrest load: 750 N; seat load: 1,000 N | ±3 mm for visible components | ≤3.5% | Material checklist and pre-shipment photographs | Review Carefully |
| Tier B | Budget lecture-hall seating with foldable seat and fixed armrests | 300 units | 20–30 days | Standard welded steel frame | Basic fabric and medium-density foam | Static seat load: 800–1,000 N | ±4 mm for non-critical trim | ≤4.0% | Visual inspection and quantity verification | Cost-Oriented |
| Tier C | Entry-level fixed chairs with limited upholstery and finish options | 500 units | 20–30 days | Painted steel frame | Standard fabric; fixed foam specification | Static seat load declared by supplier | ±5 mm unless otherwise specified | ≤6.0% | Basic quantity and appearance inspection | Higher Risk |
| Tier A | Premium seating with acoustic back panel and removable seat cushion | 100 units | 35–40 days | Reinforced steel frame with durable powder coating | Fire-retardant textile or synthetic leather; high-density foam | Seat and back durability test plus 10,000 folding cycles | ±2 mm for frame and upholstery alignment | ≤1.5% | Pre-production sample approval, process records and final AQL report | Preferred |
| Tier C | Mixed-container supply with multiple standard chair configurations | 50 units per configuration | 35–45 days | Steel frame; coating specification varies by model | Fabric, vinyl or leather-look materials subject to availability | Supplier-declared load test; independent report recommended | ±4–5 mm depending on configuration | ≤5.0% | Sample approval and loading photographs; limited process records | Verify Before Order |