Case study: Ethical sourcing & human rights due diligence — a leading company's implementation and lessons learned

Unilever's Responsible Sourcing Policy now covers more than 62,000 suppliers across 190 countries, yet the company disclosed in its 2025 Human Rights Report that 23% of Tier 2 supplier facilities in Southeast Asia still required corrective action plans following initial audits, a figure that had decreased from 41% in 2019 but underscored the persistent gap between policy ambition and ground-level implementation (Unilever, 2025). This case study examines how three leading companies in the Asia-Pacific region built and scaled ethical sourcing and human rights due diligence programs, revealing the systems, costs, failure points, and measurable outcomes that product and design teams need to understand when specifying materials and components from complex supply chains.

Why It Matters

The regulatory environment for human rights due diligence has shifted from voluntary frameworks to binding legislation across major markets. The EU Corporate Sustainability Due Diligence Directive (CSDDD), adopted in 2024, requires companies with more than 1,000 employees and net turnover exceeding EUR 450 million to identify, prevent, and mitigate adverse human rights impacts throughout their value chains. Germany's Supply Chain Due Diligence Act (LkSG) has been enforced since January 2023 for companies with more than 1,000 employees. In the Asia-Pacific region, Australia's Modern Slavery Act requires entities with annual consolidated revenue exceeding AUD 100 million to report on modern slavery risks, while Japan's Guidelines on Responsible Business Conduct and Human Rights, updated in 2024, establish due diligence expectations for companies operating across the region.

For product and design teams, these requirements create direct implications. Material specifications, component sourcing decisions, and supplier selection processes now carry compliance consequences that extend beyond cost and quality. A product designer selecting cobalt-containing battery components, palm oil-derived surfactants, or cotton-based textiles must account for the human rights risk profile of those material supply chains. The companies profiled here demonstrate how leading organizations have integrated human rights due diligence into procurement and product development workflows rather than treating it as a standalone compliance exercise.

Key Concepts

Human rights due diligence (HRDD) is the ongoing process by which companies identify, assess, prevent, mitigate, and account for how they address adverse human rights impacts connected to their operations and value chains. Unlike a one-time audit, HRDD requires continuous monitoring, stakeholder engagement, and grievance mechanisms.

Salient human rights issues are the human rights at risk of the most severe negative impact through a company's activities and business relationships. The UN Guiding Principles on Business and Human Rights require companies to prioritize action based on severity of impact rather than risk to the business, a distinction that differentiates HRDD from conventional enterprise risk management.

Tier mapping refers to the process of identifying and documenting suppliers beyond the direct (Tier 1) level. Most companies have visibility into Tier 1 suppliers but limited knowledge of Tier 2 (component manufacturers), Tier 3 (raw material processors), and Tier 4 (extraction or harvest operations) facilities. Effective HRDD requires extending visibility to at least Tier 2 and often Tier 3 for high-risk material categories.

Corrective action plans (CAPs) are structured remediation agreements between buyers and suppliers that specify the non-compliance findings, required changes, implementation timelines, and verification methods. The effectiveness of CAPs depends on whether they address root causes, such as wage structures or production scheduling, rather than symptoms alone.

What's Working

Unilever: Integrating HRDD Into Procurement at Scale Across Asia-Pacific

Unilever's Responsible Sourcing Policy, first introduced in 2014 and updated in 2023, applies a mandatory code of conduct to all suppliers and includes a risk-tiered audit program. The company operates one of the largest private-sector supplier audit programs in the world, conducting more than 3,200 audits annually across its supply chain. In the Asia-Pacific region, Unilever sources from approximately 18,000 suppliers spanning palm oil plantations in Indonesia and Malaysia, tea estates in India and Sri Lanka, and packaging manufacturers in China, Vietnam, and Thailand (Unilever, 2025).

The company's approach to scaling HRDD centered on a risk stratification model that categorizes suppliers into four tiers based on country risk, commodity risk, supplier capacity, and historical audit performance. High-risk suppliers, approximately 15% of the total base, undergo annual on-site audits by third-party firms including SGS and Bureau Veritas, supplemented by unannounced spot checks. Medium-risk suppliers are audited every two years, while low-risk suppliers complete annual self-assessments validated against documentary evidence.

Between 2020 and 2025, Unilever invested approximately $35 million in supplier capability building programs across the Asia-Pacific region, including worker voice platforms deployed at more than 1,200 supplier sites in India, Indonesia, and Vietnam. These platforms, operated through mobile applications in 14 local languages, allow workers to report concerns anonymously and receive responses within 72 hours. The platforms generated more than 48,000 worker reports in 2024, of which 12% led to formal corrective actions including adjustments to overtime practices, improvements in dormitory conditions, and resolution of wage payment delays (Unilever, 2025).

The measurable outcome of this program was a reduction in critical non-compliance findings from 8.7% of audited sites in 2019 to 3.2% in 2025 across the Asia-Pacific portfolio. However, Unilever acknowledged that audit-based approaches have inherent limitations: a 2024 internal review found that 30% of critical findings related to issues that had been identified and ostensibly remediated in previous audit cycles, suggesting that root causes in some supplier facilities had not been adequately addressed.

Nestlé: Commodity-Specific HRDD in Complex Agricultural Supply Chains

Nestlé's human rights due diligence program for its cocoa and coffee supply chains in the Asia-Pacific region illustrates how commodity-specific approaches can reach deeper into supply chain tiers than general audit programs. The company's Income Accelerator Program, launched in 2022 and operating across cocoa-sourcing regions, was complemented in 2024 by an expanded HRDD framework covering coffee sourcing from Vietnam and Indonesia, where Nestlé sources approximately 180,000 tonnes annually from more than 75,000 smallholder farmers (Nestlé, 2025).

The program deployed satellite monitoring combined with ground-level verification teams to map sourcing polygons for individual farms, enabling deforestation-free sourcing verification and labor condition assessments at the farm level. In Vietnam's Central Highlands, where approximately 40% of the country's coffee is produced, Nestlé trained 450 field agronomists to conduct household-level assessments covering child labor risk indicators, working hour documentation, and wage payment records. These assessments reached 32,000 farming households in 2024, identifying labor risk indicators at 7.8% of assessed farms, primarily related to children performing hazardous tasks during harvest periods and undocumented seasonal workers (Nestlé, 2025).

Remediation for identified issues combined immediate intervention with structural programs. Farming households where child labor indicators were found received enrollment in education access programs, income diversification support, and follow-up assessments at 90-day intervals. The 12-month recurrence rate for child labor indicators at remediated farms was 14%, compared to 42% for comparable programs that relied solely on monitoring without livelihood support, according to Nestlé's analysis of program data from 2022 to 2025.

Apple: Design-Stage Integration of HRDD for Electronics Supply Chains

Apple's Supplier Responsibility Program, covering more than 200 manufacturing partners across the Asia-Pacific region, offers the most developed example of integrating human rights due diligence into product design and material specification processes. The company's Responsible Sourcing Standard, updated annually, establishes specific requirements for minerals and materials that product design teams must account for during the design phase. For cobalt, lithium, tin, tantalum, tungsten, and gold, Apple requires full chain-of-custody documentation from mine or refinery to final assembly (Apple, 2025).

Apple's approach directly connects product design decisions to HRDD outcomes. When the company's engineering teams specify a new component, the procurement system automatically flags materials that require enhanced due diligence based on commodity type, source geography, and supplier risk profile. This integration means that a design engineer selecting a specific battery chemistry or connector alloy receives information about the human rights risk profile of available supply sources alongside technical specifications.

The company conducted 1,289 supplier assessments across 58 countries in 2024, including 226 unannounced audits. In the Asia-Pacific region, Apple identified 14 facilities where workers had paid recruitment fees to labor agents, a practice prohibited under Apple's Supplier Code. The company required these suppliers to reimburse affected workers, resulting in $6.7 million in fee repayments to more than 3,400 workers in 2024. Since 2008, Apple has required suppliers to repay a cumulative total of more than $48 million in recruitment fees to workers across its global supply chain (Apple, 2025).

Apple's Supplier Employee Education and Development (SEED) program has reached more than 5 million workers since inception, providing education on labor rights, financial literacy, and technical skills. In 2024 alone, more than 180,000 workers at supplier facilities in China, Vietnam, and India participated in SEED courses. The program's scale demonstrates that worker empowerment initiatives can operate alongside audit-based compliance without creating the adversarial dynamics that undermine many traditional monitoring approaches.

What's Not Working

Audit fatigue and diminishing returns affect even the most sophisticated programs. Suppliers serving multiple multinational buyers may undergo 10 to 15 audits annually from different customers and third-party certification bodies, each with overlapping but non-identical requirements. A 2024 study by the Responsible Business Alliance found that 67% of supplier facility managers in China and Vietnam reported that audit preparation consumed more than 200 person-hours annually, diverting management attention from the operational improvements that audits are designed to encourage (Responsible Business Alliance, 2024).

Tier 3 and Tier 4 visibility gaps persist even for companies with mature programs. Unilever's palm oil supply chain illustrates the challenge: the company can trace 97% of its palm oil to mill level (Tier 1) but only 65% to plantation level (Tier 3), with the gap concentrated in smallholder supply networks in Indonesia's Kalimantan and Sumatra provinces where millions of independent farmers sell through multiple aggregators.

Grievance mechanism effectiveness varies significantly. While worker voice platforms show promise, adoption rates among vulnerable worker populations remain uneven. Migrant workers, who face the highest human rights risks, are often the least likely to use digital reporting tools due to language barriers, distrust of employer-affiliated systems, and fear of retaliation. Unilever reported that migrant worker engagement with its worker voice platform was 38% lower than for local workers at the same facilities.

Cost allocation disputes between buyers and suppliers create implementation barriers. Ethical sourcing requirements such as enhanced documentation, dedicated compliance staff, improved worker housing, and recruitment fee reimbursement generate costs at the supplier level that are rarely fully reflected in purchase prices. A 2025 analysis by the Business and Human Rights Resource Centre found that 58% of Asia-Pacific suppliers surveyed reported absorbing more than 70% of compliance costs without corresponding price adjustments from buyers.

Key Players

Established Companies

• Unilever: operates one of the largest private-sector HRDD programs with more than 62,000 suppliers across 190 countries
• Nestlé: deploys commodity-specific human rights programs reaching 75,000+ smallholder farmers in Asia-Pacific coffee and cocoa supply chains
• Apple: integrates HRDD into product design processes with 1,289 supplier assessments annually and cumulative $48M+ in recruitment fee repayments

Startups

• Ulula: worker voice and stakeholder engagement platform used by more than 100 companies to collect direct feedback from supply chain workers
• Sedex: ethical trade membership organization providing the SMETA audit methodology and risk assessment tools used across 85,000 supplier sites globally
• Sourcemap: supply chain mapping and traceability platform enabling Tier 2 through Tier 4 visibility for conflict minerals and agricultural commodities

Investors and Funders

• Humanity United: philanthropic organization investing in technology solutions for supply chain transparency and forced labor prevention
• IFC (International Finance Corporation): provides blended finance for supplier capability building and ethical sourcing infrastructure in emerging markets
• Laudes Foundation: funds systemic change initiatives in garment, electronics, and agricultural supply chains across Asia

Action Checklist

• Map current product material specifications against high-risk commodity categories (cobalt, palm oil, cotton, natural rubber, mica) and identify supply chain tiers requiring enhanced due diligence
• Implement a risk stratification model for suppliers that combines country risk indices, commodity risk profiles, and historical audit performance to allocate monitoring resources proportionally
• Deploy worker voice platforms at Tier 1 and high-risk Tier 2 supplier facilities with multi-language support and response time commitments of 72 hours or less
• Require full chain-of-custody documentation for at least two high-risk material categories within 12 months, extending to all high-risk materials within 36 months
• Integrate HRDD risk flags into product design and material specification workflows so that design teams receive supply chain risk information alongside technical and cost data
• Establish a recruitment fee reimbursement policy requiring suppliers to repay fees charged to workers by labor agents, with verification through payroll audits and worker interviews
• Join pre-competitive industry platforms such as the Responsible Business Alliance or AIM-Progress to share audit data, reduce supplier audit burden, and access validated due diligence tools

FAQ

Q: What does it cost to implement a comprehensive HRDD program for an Asia-Pacific supply chain? A: Costs vary significantly by supply chain complexity and existing infrastructure. Based on disclosed figures from the companies profiled, annual HRDD program costs for large multinationals range from $15 million to $50 million, covering audits ($3,000 to $8,000 per on-site assessment), worker voice platforms ($2 to $5 per worker per year for technology licensing), capability building programs ($500 to $2,000 per supplier site for training), and internal program management staff. For mid-size companies with 500 to 2,000 suppliers, annual costs typically range from $1.5 million to $5 million. The return on investment is difficult to isolate but includes avoided regulatory penalties, reduced supply disruption, and protection of brand value.

Q: How effective are audits at detecting forced labor and other severe human rights abuses? A: Audits alone have significant limitations in detecting forced labor. A 2024 analysis by the International Labour Organization found that standard social audits detected indicators of forced labor at only 16% of facilities where subsequent in-depth investigations confirmed such indicators existed. The primary detection gaps arise from coached worker interviews, restricted auditor access to dormitories and recruitment records, and the scheduled nature of most audits. Leading programs supplement audits with unannounced visits, worker voice platforms, payroll analysis, and collaboration with local civil society organizations to improve detection rates.

Q: How should product design teams incorporate HRDD considerations into material selection? A: Product design teams should receive structured risk assessments for each material category that include human rights risk ratings by source geography, availability of certified low-risk supply, cost premiums for traceable materials, and lead time implications. Apple's model of flagging materials at the design specification stage is considered best practice. Design teams should be empowered to select alternative materials or suppliers when risk profiles exceed acceptable thresholds, with clear escalation procedures for cases where no low-risk alternative exists at acceptable cost. Training on HRDD fundamentals, including the distinction between business risk and human rights risk, should be mandatory for procurement-adjacent design roles.

Q: What is the timeline for achieving meaningful HRDD program maturity? A: Based on the trajectories of Unilever, Nestlé, and Apple, achieving a mature HRDD program that covers Tier 1 and Tier 2 suppliers with effective monitoring, grievance mechanisms, and remediation processes requires 3 to 5 years of sustained investment. Extending effective coverage to Tier 3 and Tier 4 for high-risk commodities typically requires an additional 2 to 3 years. Companies starting from a low base should prioritize establishing a salient issues assessment and Tier 1 audit program in year one, extending to Tier 2 and deploying worker voice tools in years two and three, and building commodity-specific deep-tier programs in years four and five.

Sources

• Unilever. (2025). Human Rights Report 2025: Progress, Challenges, and Commitments. London: Unilever PLC.
• Nestlé. (2025). Creating Shared Value and Sustainability Report 2025. Vevey: Nestlé S.A.
• Apple Inc. (2025). Supplier Responsibility Progress Report 2025. Cupertino, CA: Apple Inc.
• Responsible Business Alliance. (2024). Supplier Audit Effectiveness and Burden Study: Asia-Pacific Findings. Arlington, VA: RBA.
• Business and Human Rights Resource Centre. (2025). Cost of Compliance: How Ethical Sourcing Requirements Impact Suppliers in Asia. London: BHRRC.
• International Labour Organization. (2024). Audit Effectiveness in Detecting Forced Labour Indicators: A Multi-Country Assessment. Geneva: ILO.
• European Commission. (2024). Corporate Sustainability Due Diligence Directive: Implementation Guidelines. Brussels: European Commission.