Case Study: Veolia achieves seamless big‑bang 14,000‑user day‑one deployment through rapid integration testing with Workday Adaptive Planning

Veolia engages Workday services for integration testing before deploying its finance, HR, and payroll solutions

Veolia, a global resource-management group operating in water, waste, and energy, faced unsustainable complexity in its UK and Ireland operations: 14,000 employees across 400 sites were supported by disparate apps (including 50 ERPs) and paper-based processes. The organization needed a centralized, cloud-based finance, HR, and procurement platform and planned a high-risk big‑bang deployment that required 130 integrations to work seamlessly on day one—especially payroll and vendor payments.

Veolia partnered with Workday’s Test Lead Service to architect and drive a rigorous testing program, executing more than 10,000 tests (including 5,000 scenario tests in five weeks and 7,000 end-to-end tests) across a 20‑month deployment. The result was a successful day‑one rollout to 14,000 users with seamless payroll and payments, doubled operational user access (from 4,500 to 9,000), real‑time financial reporting, and a single integrated system that streamlined processes and improved employee experience.

Veolia

Mark Eaglefield

Head of Corporate Systems