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A factory audit is the foundation of a reliable supply chain. This guide provides comprehensive checklists for quality system, social compliance, and environmental audits — covering everything auditors evaluate during a supplier assessment.
Factory audits are categorized by their focus area. Most importers conduct a quality system audit at minimum, with social compliance and environmental audits increasingly required by major retailers and international regulations. Understanding the different types helps you choose the right audit scope for your supplier evaluation.
Evaluates the factory's manufacturing capability, quality management systems, production processes, and ability to consistently produce goods meeting specifications. This is the most common type of factory audit for importers.
Key areas: Quality management, incoming material control, process control, final inspection, calibration, and corrective action systems.
Assesses working conditions, labor practices, worker health and safety, and compliance with local labor laws and international standards (such as SA8000, BSCI, WRAP, or SMETA). Required by most major retailers and brands.
Key areas: Child labor, forced labor, working hours, wages, workplace safety, fire safety, dormitory conditions, and freedom of association.
Reviews the factory's environmental management practices, waste handling, emissions controls, and compliance with environmental regulations. Increasingly important for brands with sustainability commitments.
Key areas: Waste management, hazardous materials handling, air and water emissions, chemical storage, energy use, and environmental permits.
Factory auditors evaluate both documentation and physical conditions. They compare what the factory claims (in policies, procedures, and certifications) against what they observe on the factory floor. Auditors look for evidence that quality systems are not just documented but actively implemented and maintained.
A skilled auditor will examine production areas, storage facilities, testing labs, worker facilities, and administrative records. They interview management about systems and procedures, and may interview workers confidentially about actual conditions. The goal is to form an objective assessment of the factory's true capability and compliance status.
Clear organizational structure, defined responsibilities, management commitment to quality, and adequate resources allocated to quality control.
Equipment condition and maintenance, production capacity vs. order requirements, technology level, and skilled workforce availability.
Incoming inspection, in-process checks, final inspection procedures, calibrated measuring equipment, and quality records.
Ability to trace raw materials from receipt through finished goods, batch identification, and first-in-first-out (FIFO) material management.
Cleanliness, organization (5S methodology), adequate lighting, ventilation, temperature control, and general housekeeping standards.
Valid ISO certifications, industry-specific accreditations, testing reports, regulatory compliance documentation, and export licenses.
Determine the type of audit you need (quality system, social compliance, environmental, or combined). Define specific areas to evaluate, industry standards to verify against, and any retailer or regulatory requirements that apply.
Engage a qualified third-party audit firm like Tetra Inspection. Provide the factory address, product types manufactured, number of employees, and your audit checklist. Schedule the audit with sufficient notice for the factory to prepare.
The auditor begins with an opening meeting with factory management, then reviews documentation: quality manuals, ISO certifications, test reports, employee records, training logs, and compliance certificates relevant to the audit scope.
The auditor conducts a systematic walkthrough of all production areas, warehouses, and worker facilities. They observe production processes, equipment condition, workplace safety, housekeeping, material storage, and working conditions.
For social compliance audits, the auditor interviews workers (confidentially) about working hours, wages, safety conditions, and freedom of association. Employee records, payroll documents, and time cards are reviewed.
The auditor presents preliminary findings to factory management, highlighting critical non-conformances, areas of concern, and positive observations. The factory has an opportunity to provide clarification.
A detailed audit report is delivered within 48–72 hours, including a pass/conditional/fail rating, findings by category, photographic evidence, and recommended corrective actions with timelines. A follow-up audit may be scheduled to verify corrective actions.
Use this checklist to evaluate a factory's quality management systems and manufacturing capability. Each checkpoint should be verified through documentation review and physical observation.
Social compliance audits verify that the factory operates ethically and meets labor standards. Critical non-conformances (such as child labor or unsafe emergency exits) typically result in automatic audit failure.
Environmental audits assess the factory's impact on the environment and compliance with applicable environmental regulations.
Understanding the most common audit findings helps you set realistic expectations and focus improvement efforts on the areas most likely to have issues. Here are the findings our auditors encounter most frequently:
Blocked emergency exits, missing fire extinguishers, child labor, excessive overtime without records, no machine guarding on hazardous equipment
No documented quality procedures, uncalibrated measuring instruments, missing incoming material inspection, no corrective action system, incomplete employee records
Housekeeping issues, incomplete training records, minor documentation gaps, outdated procedures, inadequate lighting in some areas
Opportunities for improvement, best practice recommendations, equipment upgrade suggestions, process optimization potential
Factory audit reports typically include an overall rating and detailed findings by category. Here is how to interpret the most common rating scales:
| Rating | Score Range | Meaning | Action |
|---|---|---|---|
| Pass / Approved | 80–100% | Factory meets quality and compliance requirements | Proceed with orders; schedule annual re-audit |
| Conditional | 60–79% | Factory has some non-conformances requiring improvement | Request corrective action plan; re-audit in 60–90 days |
| Fail / Not Approved | Below 60% | Significant non-conformances; factory not ready | Do not place orders until issues are resolved; consider alternative suppliers |
A conditional result does not necessarily mean you should avoid the supplier. Many factories improve significantly after receiving structured feedback. The key is to verify that corrective actions are genuine and sustainable — not just temporary fixes for the re-audit. Learn more about our factory audit services and how we support your supplier development program.
A factory audit is a systematic assessment of a manufacturing facility conducted by a trained auditor. It evaluates the factory's capability to produce goods meeting quality standards, its compliance with social and environmental regulations, and its overall management systems. Factory audits are essential for qualifying new suppliers and monitoring existing ones.
The three main types are: Quality System Audits (assessing manufacturing capability, quality management, and production processes), Social Compliance Audits (evaluating working conditions, wages, worker safety, and labor practices), and Environmental Audits (checking waste management, emissions, chemical handling, and environmental regulations). Many buyers conduct combined audits covering multiple areas.
A standard factory audit takes one full day (one man-day, approximately 8 hours on-site). Large factories with over 500 workers, multi-building facilities, or audits with expanded scope (combining quality, social, and environmental assessments) may require 2–3 man-days.
Factory audit costs with Tetra Inspection start at $440 per man-day in Asia & Africa, $540 in South America & Turkey, and $640 in Europe — all-inclusive with no hidden fees. Most standard audits can be completed in one man-day. This investment is small compared to the potential cost of partnering with an unreliable or non-compliant supplier.
A factory audit evaluates the factory itself — its systems, processes, capabilities, and compliance. It determines whether the factory is capable of producing quality goods consistently. A product inspection evaluates specific products from a production run to verify they meet specifications. Audits assess the "factory," inspections assess the "product."
Conduct a factory audit before placing your first order with a new supplier, when quality issues arise with an existing supplier, when switching product lines or increasing order volumes, when retailer or regulatory requirements demand it, and periodically (annually or bi-annually) to maintain supplier quality standards.
If a factory fails the audit, the audit report will detail specific non-conformances and their severity. You can share findings with the supplier and request a corrective action plan (CAP) with timelines. A follow-up audit is then scheduled (typically 30–90 days later) to verify corrective actions have been implemented. Critical failures (child labor, safety hazards) may warrant immediately disqualifying the supplier.
Yes, and this guide provides a checklist for exactly that purpose. However, many buyers prefer semi-announced or unannounced audits to see the factory's everyday conditions rather than a prepared presentation. For social compliance audits in particular, unannounced visits provide a more accurate picture of actual working conditions.
Get the complete factory audit checklist as a printable PDF.
Tetra Inspection provides comprehensive factory audits in 45+ countries. Our trained auditors evaluate quality systems, social compliance, and environmental practices to protect your supply chain.
