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Worker-Driven Due Diligence: What It Means, Why It Matters, and How to Evaluate Worker Voice Platforms

  • Jan 15, 2024
  • 7 min read

Updated: 5 days ago

If you've run worker surveys before and walked away wondering what to do with the results, you're not alone. That gap between data and action defined the first decade of worker voice technology across the industry. Brands had reports they couldn't act on. Suppliers felt measured, not supported. Workers answered surveys and never saw anything change — which, over time, eroded the trust that makes worker voice work at all.

The problem wasn't the surveys. That's the context you need to evaluate any worker voice platform today.


What worker voice technology actually is — and what it isn't


Worker voice technology gives workers in global value chains a direct, anonymous channel to report conditions, raise concerns, and respond to surveys — independent of management. Done well, it surfaces what audits cannot: the gap between documented policy and lived experience on the factory floor.


But worker voice is not the same as worker-driven due diligence. The distinction matters enormously for HRDD. Worker-driven due diligence means the entire process — from risk identification to remediation — is structured around what workers actually report. Audits assess what's been built: systems, policies, procedures. Worker surveys verify whether those systems are working for the people inside them. And a structured action framework — built on what workers said — drives improvement. That full loop is what CSDDD and the UN Guiding Principles require.


How the industry got here — and where it got stuck


The early days of worker voice were genuinely exciting. Mobile phones made it possible to hear directly from workers in factories and farms that had previously been impossible to reach at scale. The question the industry — Labor Solutions included — was focused on was: how do we get to workers, and what should we ask them? That was the right question to start with. Survey design, language access, anonymity, delivery — these are hard problems, and solving them opened up a genuinely new source of information about conditions in global value chains.


What the industry hadn't yet figured out was what to do with the data once it arrived. There was no standard framework for turning findings into action. Brands received reports. Suppliers received scores. The question of what happened next — who was responsible, what the priority should be, how progress would be tracked — was largely left unanswered. That gap is where worker voice programs stalled, and where worker trust began to erode.


Where Labor Solutions started — and why it matters


Labor Solutions was founded as a human resources company, working directly inside factories with human resources managers, worker welfare officers, and production supervisors. That origin shaped everything — not just what the technology does, but what problem it was designed to solve. When you start from the factory floor, you understand that a survey finding is only useful if the supplier knows what to do with it.


You understand that workers won't trust a grievance channel that management controls. You understand that anonymity isn't a feature — it's the foundation of everything.

Ulula's founders built a credible, purpose-built worker voice tool and brought genuine expertise to the space. But Ulula was built from a compliance and technology starting point. Those are different design philosophies, and they produce different answers to the "now what" problem.


What the EcoVadis acquisition changed


If you used Ulula before 2024, the product you would engage with now is not the same one. EcoVadis acquired Ulula and relaunched the product as Worker Voice Connect (formerly known as Ulula) — integrated into a platform whose core business is supplier ratings and scorecards. That is the critical distinction. EcoVadis is doing due diligence with workers as an afterthought. Worker voice was added to a ratings platform — it was not the foundation one was built on. When a tool is absorbed into a platform designed for a fundamentally different purpose, the product roadmap, the incentives, and the priorities change.


EcoVadis serves thousands of companies at scale. That model requires standardization, volume, and simplicity. For a rating platform, that's the right design. For worker voice, it's a fundamental mismatch. Effective worker voice depends on long-term, trusted engagement — not volume. There is also a structural question any procurement or legal team should ask: EcoVadis rates suppliers, and those ratings are purchased by both brands and suppliers. Introducing a worker voice layer into that same commercial ecosystem creates a tension between the rating business and genuine worker feedback.


Labor Solutions has no supplier rating business. Its only commercial interest is in the quality and volume of worker engagement.


Audits assess. Surveys verify. IMPROVE acts.


This is the framework that separates worker-driven due diligence from everything else. Audits assess compliance from the outside — they tell you what systems exist. Worker surveys verify whether those systems are working for the people inside them — they tell you what workers actually experience. WOVO IMPROVE drives action from the finding — it tells you what to do next, and tracks whether you did it.


When a survey runs through WOVO, the lowest-scoring indicators automatically trigger IMPROVE — a structured supplier self-assessment that diagnoses root cause and generates a prioritized action plan, capped at three focus areas so suppliers aren't overwhelmed. The assessment adapts to the supplier's maturity level. Evidence upload and progress tracking create an auditable loop from finding to fix. IMPROVE was built because Labor Solutions saw, in real factories with real human resources managers, what happened when data arrived without a structure for action. Regulators don't ask whether you collected data. They ask whether the data led to remediation. IMPROVE creates the evidence trail.


Grievance mechanisms that workers actually use


A grievance mechanism that workers don't trust is not a grievance mechanism — it's a liability. WOVO Connect is built on a principle most grievance tools miss: the goal is not to manage complaints, it's to build a channel workers believe in enough to use. Workers can raise issues anonymously via app, SMS, QR code, WhatsApp, or WeChat — in their language, on a device they already have. Human resources managers and brand teams receive, sort, and respond through a case management dashboard. An unused grievance mechanism is a red flag, not a neutral outcome.


The adidas partnership shows what this looks like over time: response time dropped from 49 hours to under 11 hours between 2019 and 2025, and grievance volume increased significantly — because workers trusted the channel enough to use it.


The evidence base


A randomized control trial across 7,500 workers at Shahi Exports in India — conducted by the University of Michigan, the University of Hawaiʻi, and Good Business Lab — found WOVO delivered a 52% net rate of return, with workers 44% less likely to be absent and 33% more likely to be retained. MIT research found worker voice programs linked to up to 15% productivity gains.


After COVID factory closures in Vietnam, factories using WOVO achieved near-full workforce return in one month — versus 54% industry-wide. The adidas 2024 Annual Report cites WOVO by name as their primary worker data layer for CSDDD compliance. Labor Solutions reports 3.8 million active workers across 180 countries and 41 languages — active meaning within a defined engagement period, not registered accounts.


The full HRDD stack — in one platform


CSDDD compliance requires more than a survey. It requires:


These are not modular add-ons. They are an integrated system designed to function together — because HRDD is a process, not a project.


Questions to ask any worker voice provider


If you are evaluating worker voice platforms — including EcoVadis Worker Voice Connect (formerly known as Ulula) — these are the questions that surface the differences that matter:

  • What happens after a survey? Is there a structured action pathway built into the platform, or does the client manage that independently?

  • How is anonymity enforced — and can workers verify it independently of management?

  • What is the provider's commercial model, and are there any structural conflicts with genuine worker feedback?

  • Are reported worker numbers active users within a defined period, or registered accounts?

  • Has the product's ownership or strategic direction changed recently, and what does that mean for implementation quality and long-term support?

  • Does the platform track grievance mechanism utilization — not just volume — to confirm workers are actually engaging?


Frequently asked questions


What is worker-driven due diligence?

Worker-driven due diligence is an approach to HRDD where identifying, prioritizing, and remediating risks is structured around what workers directly report — not what suppliers disclose or audits document. It requires a full loop: listening to workers, verifying findings, and driving structured action from the results.


What is EcoVadis Worker Voice Connect?

EcoVadis Worker Voice Connect (formerly known as Ulula) is a worker survey and grievance tool integrated into the EcoVadis supplier ratings platform. EcoVadis acquired Ulula in 2024 and relaunched the product as part of its broader sustainability ratings offering.


How does WOVO differ from EcoVadis Worker Voice Connect?

WOVO was built from the factory floor up, by a team with human resources and worker engagement backgrounds — not compliance or ratings. The core difference is structural: WOVO includes IMPROVE, a built-in action framework that turns survey findings into supplier action plans with progress tracking. Worker voice without a structured action pathway leaves brands with data and no clear next step. That gap is what IMPROVE was built to close.


What does CSDDD require for worker voice?

CSDDD requires brands to demonstrate ongoing meaningful engagement with workers in their value chains as part of human rights due diligence. That means not just collecting data, but showing that worker feedback led to documented action and remediation. A survey tool alone does not meet this standard — brands need evidence of the full loop from finding to fix.


What is WOVO Connect?

WOVO Connect is Labor Solutions' grievance mechanism module — an anonymous, multi-channel reporting tool available via app, SMS, QR code, WhatsApp, and WeChat in 41 languages. It includes a case management dashboard for human resources managers and brand teams, with utilization tracking to confirm the channel is functioning and trusted.


The bottom line

EcoVadis entering the worker voice space confirms what the regulatory environment already requires: worker engagement is no longer optional. But there is a meaningful difference between a ratings platform that added a survey tool and a platform built from the beginning to answer the question workers are actually asking: does anyone hear me, and did anything change?


Labor Solutions has been doing worker-driven due diligence for 13 years — in real value chain environments, at scale, in ways that workers actually use, and in ways that lead to documented change. Audits assess. Surveys verify. IMPROVE acts. That full loop is what HRDD requires.

 
 
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