Budget Forecasting Tool for Nuclear Power Plants
Context
EDF needed an internal web application to model energy markets and forecast maintenance activities for its nuclear power plants over a 10-year horizon.
The main objective
Improve the reliability of budget estimates by centralizing critical data and streamlining collaboration across departments (finance, operations, maintenance).
Year
2023-2025
Client
EDF
User challenges identified
Proliferation of fragmented, non-ergonomic tools
Critical files scattered, causing errors and delays
Complex communication between different business teams
My Role & UX Approach
Strategic framing
Facilitated workshops and interviews with stakeholders to align on the product vision, scope, and KPIs.User research
Field observations with 5 domain experts
30 semi-structured user interviews
Document analysis: existing information architecture, internal studies
Creation of a shared atomic research repositoryIdeation & co-design
Organized design sprints and cross-team workshops (idea generation, co-conception, product planning)UX production
Defined 3 personas enriched with experience maps and user journeys
Designed wireframes and interactive prototypes (Figma)
Close collaboration with developersUser testing & iterations
Usability tests on the overall journey and specific features before production
Guerrilla testing on early versions for fast iteration
Proposed Solutions
Collaborative dashboard: consolidated 10-year view of budgets and maintenance operations with dynamic filters
Single point of access: centralized critical documents, secure versioning, granular access rights
Guided, accessible workflow: step-by-step navigation, compliant with RGAA accessibility standards
Results & Impact
✅ Reduced estimation error rate compared to the previous process
✅ Increased productivity for finance and maintenance teams