Grievance Integrity: From Mechanism Existence to Regulatory Evidence — Across 45 Sites

The buyer deployed the WELL Grievance Integrity program — Labor Solutions' thematic framework for UNGP Principle 31 assessment, run within the WELL Cycle— across 45 strategic and high-risk manufacturing sites in six countries, reaching more than 80,000 workers. Six months after WELL Action Plans were issued and implemented, 83% of sites had completed their assigned actions and 72% had progressed to the next maturity level on grievance mechanisms. 

Labor Solutions’ Worker-Driven Due Diligence methodology, WELL, moves annually through Listen, Diagnose, Improve, and Educate to turn worker voice into structured site-level risk intelligence The WELL Grievance Integrity program sets the indicators, maps worker and site data against all eight effectiveness criteria, and structures the gap analysis and action planning that follows — a fundamentally different model from audits, which start with systems. The WELL Cycle starts with rights-holders. 

Start with What Workers Experience — Not What Systems Document  

Across most value chains, grievance mechanisms exist on paper. Audits confirm their existence. They say nothing about whether workers can access them, whether sites have the management competencies to run them effectively, or whether anything changes for workers when they raise a concern. Low case volume signals access and trust gaps — not the absence of issues. Labor Solutions finds risks in 35% of sites that audits have cleared. This buyer was no different: two Operational Grievance Mechanisms — one in-house, one third-party — received fewer than 20 worker cases across the year from all strategic sites.  

The real question was whether the systems in place actually worked for workers — and if not, why. That gap is now a legal exposure. UNGP Principles 29–31 require buyers to ensure workers have access to effective grievance mechanisms. CSDDD makes that obligation enforceable — buyers must document that mechanisms work for workers, not just that they exist. ESRS S2-3 requires disclosure of how workers can access remediation and what the buyer has done when mechanisms fall short. An audit that confirms a procedure document exists satisfies none of these requirements. The scale of what was missing became clear when more than 65% of workers responded to the WELL Worker Survey — a response rate that itself signals worker readiness to speak when a trusted channel exists. 

Diagnose the Competency Gap Behind Every Worker-Reported Gap

The buyer ran the WELL Cycle with Grievance Integrity as the program focus. Grievance Integrity sets the indicators, maps worker and site data against all eight UNGP Principle 31 effectiveness criteria and structures the gap analysis and action planning that follows — a fundamentally different model from audits, which start with systems. The WELL Cycle starts with rights-holders. 

The WELL Worker Survey surfaced how workers actually experienced the grievance mechanism. Grievance Integrity mapped those findings against all eight UNGP Principle 31 criteria — Legitimate, Accessible, Predictable, Equitable, Transparent, Rights-Compatible, Engagement & Dialogue, and Continuous Learning. Each criterion was assessed against the evidence source the criterion itself demands: some, like Accessible, can only be assessed by workers — they are the ones who know whether a channel is reachable. Others, like Rights-Compatible, require a systems assessment, because workers have no visibility into whether resolutions meet international standards. This is why both the WELL Worker Survey and the are required inputs — the worker survey alone does not produce a defensible UNGP Principle 31 assessment. 

Where workers reported gaps, the WELL Self-Diagnostic Tool assessed the management competencies behind each criterion — not whether a procedure existed, but whether supervisors handle reports without retaliation, whether workers are told what happens next, whether feedback loops close. Each site received a targeted WELL Action Plan. 

Close Gaps — and Show the Evidence: 83% Done, 72% Advanced 

Workers said they didn’t know how to get help outside the company, felt management rarely acted on feedback, and found formal channels inaccessible. The WELL Self-Diagnostic corroborated this: sites had no structured feedback loop, relied on supervisor-mediated reporting, and had never communicated external grievance options to workers. The problem wasn’t missing paperwork — it was missing competency. 

Six months after WELL Action Plans were issued and adopted by sites, 83% of sites completed their assigned actions, clustered around three areas: manager training on grievance handling, more worker-centric reporting channels, and communicating external grievance options back to workers. 72% advanced to the next maturity level. The buyer now sees, per site, what workers experienced, what management competency gap caused it, and what was done. 

Turn Worker Evidence into Regulatory Evidence — ESRS S2 and CSDDD Ready 

Labor Solutions produced a structured analysis that the buyer could directly use for their ESRS S2 report obligations. The Grievance Integrity findings substantiated the impact-side evidence for the double materiality assessment and supported disclosures under S2-2 (engagement with value chain workers), S2-3 (remediation processes and grievance channels), and S2-4 (actions taken on material impacts) — with worker-reported evidence, site-level, criterion by criterion. For buyers subject to ESRS reporting, that evidence is not optional: S2-3 and S2-4 requires disclosure of how workers access remediation and what the buyer has done when mechanisms fall short. Grievance Integrity produced both. 

For CSDDD, the Grievance Integrity program operationalized the core due diligence obligation end to end — the worker survey as documented rightsholder engagement and impact identification, the gap analysis as prioritization, the action plan as the prevention and mitigation evidence the directive requires. The buyer left with a complete, submittable evidence package across both regulatory frameworks. 

Run the WELL Cycle — and Know Whether Your Mechanisms Work

UNGP Principle 31 assesses grievance mechanisms by worker experience across eight criteria — not by whether a procedure document exists. Audits tell buyers what sites built. The WELL Cycle tells buyers whether it works — and produces the criterion-level, worker-grounded evidence that regulators and rightsholders now require. That is Worker-Driven Due Diligence. 

To run the WELL Cycle on grievance mechanisms or other salient topics across your value chain, write to info@laborsolutions.tech. 

Workers first. Always.