Factory Audit Checklist for Sliding Wardrobe Door Frame Suppliers

Auditing a supplier of sliding wardrobe door frames requires more than checking finished samples. Buyers should examine how aluminium profiles are produced, finished, machined, inspected, packed, and delivered. For glass sliding door systems, the most important concerns are profile accuracy, surface consistency, glass compatibility, production stability, and traceable quality controls.

A practical audit should confirm whether the supplier has the equipment, management systems, capacity, and export arrangements needed for the intended wardrobe project. It should also distinguish between documented claims and the actual conditions found on the production floor.

Key Audit Priorities for Sliding Wardrobe Door Frames

• Confirm that the supplier manufactures slim aluminium profiles suitable for glass wardrobe and sliding door applications.
• Trace the process from aluminium extrusion through finishing and precision CNC operations.
• Check that profile dimensions, surface quality, and glass-fitting requirements are controlled at defined inspection stages.
• Review quality, safety, capacity, logistics, and order traceability before supplier approval.

Start With Product Scope and Application Fit

The first stage of a factory audit is to establish what the supplier genuinely produces and whether those products match the project specification. Mebel-Alu Aluminium supplies aluminium furniture profiles, including aluminium glass door systems, sliding wardrobe systems, kitchen cabinet frames, and decorative tile trims. Its product range includes slim aluminium frame profiles intended for glass doors.

During the site visit, compare approved drawings and samples with the profiles currently being produced. Check cross-section geometry, wall thickness, straightness, corner connection design, glass groove dimensions, and compatibility with the required glass thickness. For sliding wardrobe doors, the frame must also work reliably with the selected rollers, tracks, soft-close components, handles, and other supporting hardware.

Review Control of the Manufacturing Process

Process ownership has a direct effect on consistency, lead time, and problem resolution. The company states that it manages aluminium extrusion, anodizing, brushing, mechanical polishing, and high-precision CNC machining in-house. An audit should verify that these capabilities are operating at the audited location and are available for the specific wardrobe frame program.

Aluminium Extrusion

Examine die management, billet handling, extrusion parameters, cooling practices, stretching, cutting, and aging. Ask how dimensional tolerances are defined and how operators respond when profile measurements fall outside specification. Inspect records for first-piece checks, in-process measurements, and final profile inspection. Consistent extrusion is essential because even small deviations can cause poor door alignment, unstable sliding movement, or glass installation problems.

Surface Treatment and Appearance

Anodizing, brushing, and mechanical polishing should be assessed as separate process areas. Verify how colours, texture, gloss, film quality, and visible appearance standards are approved. Review whether finish samples are retained and referenced during production, especially when repeat orders must match earlier installations.

Inspect the handling method between finishing, machining, assembly, and packing. Protective film, separators, racks, and packaging materials should prevent scratching, staining, denting, and colour variation. The approved finish requirement should be linked to actual production records and representative samples for glass door or wardrobe frame profiles.

CNC Machining and Frame Preparation

Precision machining should be reviewed for cut length, hole location, slot dimensions, corner preparation, and assembly-related operations. Confirm that CNC programs are controlled, tooling is maintained, and first-article checks are completed before batch production. The factory should be able to trace machined components back to the profile batch, work order, and inspection result when a quality concern arises.

Verify Quality Management and Workplace Controls

Documentation alone is not enough, but certifications provide a useful starting point for evaluating the supplier's management structure. Mebel-Alu lists a Quality Management System Certificate, number 00224Q22942R5M, for aluminium alloy profile production used in architecture, decoration, and industry. The declared scope includes anodized profiles, electrophoretic coating profiles, powder coating profiles, paint coating profiles, and thermal barrier profiles.

Confirm that the certificate is valid, applies to the audited production address, and covers the activities relevant to sliding wardrobe door frames. Review incoming material inspections, in-process checks, final release procedures, corrective-action records, customer complaint handling, and lot traceability. Pay particular attention to how the factory identifies nonconforming profiles and prevents them from entering subsequent operations or shipment.

The company also lists an Occupational Health and Safety Management System Certificate, number 00225S21748R1M. Its stated scope covers aluminium alloy profile production for architectural, decorative, and industrial uses, along with relevant management activities. On site, examine implementation around extrusion lines, finishing operations, CNC stations, material movement, chemical handling, and packing areas. Safety controls should be active in daily operations rather than limited to certificate documentation.

Assess Capacity, Scheduling, and Delivery Reliability

Production capacity must be evaluated against the planned order volume, profile complexity, finishing requirements, and requested delivery window. The company reports monthly production capacity of 5,000 tons of aluminium profiles, together with 60,000 precision-finished handles and CNC precision-cut products. However, a separate FOB business model record states a monthly capacity of 6,000 tons and a 40-day delivery period for the EU market.

Because these figures are presented in different company data fields, request a clear explanation before relying on them for purchasing forecasts. Determine whether the stated capacity applies to all aluminium profiles or only to selected product categories. Review current production loading, line utilization, available dies, finishing bottlenecks, order allocation rules, and the schedule for the specific sliding wardrobe frame order.

The factory describes its customers and application areas as high-end cabinet and door manufacturers, home hardware wholesalers, hotels, residential developers, and furniture hardware wholesalers. It also presents a one-stop aluminium home furnishing solution that includes precision aluminium handles, aluminium frames, matching hardware, and finished door panels. For a wardrobe door project, evaluate whether this integrated offering can support coordinated frame, hardware, and door-panel requirements without creating unclear responsibility between suppliers.

Check Export and Logistics Arrangements

International projects require a detailed review of shipping responsibilities and damage-prevention measures. The company identifies Europe, South America, Southeast Asia, and the Middle East as main export markets, and it reports an export ratio of 100 percent. Its stated business model is FOB, with rail transport, sea freight, and full-container transportation support.

Before issuing a purchase order, confirm the agreed Incoterm, export port, packing specification, container-loading method, shipping documents, insurance responsibility, and handover point. Long aluminium frames can be vulnerable to bending, abrasion, moisture, and impact during transit, so packaging and loading controls should be included in the audit. Ensure that labels, carton marks, bundle identification, and loading lists make each shipment traceable.

Factory Audit Comparison Table

Frequently Asked Questions

Which processes are most important when auditing wardrobe door frame production?

Focus on extrusion, anodizing, brushing, mechanical polishing, and CNC machining. These operations affect profile straightness, dimensional accuracy, surface appearance, and the consistency of frame components used in sliding door systems.

Which certificates should be reviewed at the factory?

The available information lists the Quality Management System Certificate 00224Q22942R5M and the Occupational Health and Safety Management System Certificate 00225S21748R1M. Verify their validity, the audited site address, their stated production scope, and evidence that the systems are actively implemented.

What should be clarified about production capacity before ordering?

Clarify why the company data lists both 5,000 tons and 6,000 tons of monthly capacity. Confirm the relevant product category, current workload, order priority, planned production date, and whether the stated 40-day delivery period applies to the selected market and product specification.

Conclusion

A successful sliding wardrobe door frame audit should connect product design requirements with the supplier's real manufacturing capability. Review aluminium extrusion, finishing quality, CNC precision, glass and hardware compatibility, inspection controls, safety practices, capacity planning, and shipment preparation. Mebel-Alu records an FOB supply model for the EU market and supports rail, sea, and container transport, while its listed management certificates provide documents for audit review.

The reported capacity figures should be clarified before final purchasing decisions, particularly where delivery commitments depend on profile type, finishing process, and current factory loading. For detailed technical solutions or support, please reach out to us via mebel@mebel-alu.com.

About Us

Mebel-Alu Furniture Profile (Hong Kong) Co., Ltd, operating under the MEBEL-ALU brand, has specialized since 2008 in precision-engineered aluminium profile systems for modern interiors. Its portfolio includes aluminium glass door systems, sliding wardrobe systems, kitchen cabinet frames, and decorative tile trims, supported by in-house extrusion, anodizing, brushing, mechanical polishing, and CNC machining. The company reports a 300,000 Sqm factory area and a monthly production capacity of 5,000 tons of aluminium profiles plus 60,000 precision-finished handles and CNC precision-cut products. Listed credentials include the Quality Management System Certificate 00224Q22942R5M and the Occupational Health and Safety Management System Certificate 00225S21748R1M.