Storengy modernises SAP maintenance processes with Neptune Software

A subsidiary of the ENGIE Group, Storengy is a leading operator in underground natural gas storage and a pioneer in renewable energy solutions such as hydrogen and biomethane. With 14 sites across France, the company is undertaking a large-scale digital transformation to improve asset reliability, strengthen traceability and simplify the daily work of its maintenance teams.

Following a successful first collaboration with HRC Consulting in 2024 on the digitalisation of stock withdrawals, Storengy engaged our teams once again to design and deploy mobile maintenance applications for SAP S/4HANA using the Neptune Software platform.

Project challenges

• Guarantee offline availability for technicians working in low-connectivity areas
• Integrate tightly with SAP S/4HANA modules MTS (Maintenance) and PTP (Supply Chain) while keeping interfaces simple
• Support advanced management of Maintenance Notifications, a key process at Storengy
• Deliver an ergonomic and fast field experience: quick data entry, clear navigation, smart filters and QR code scanning,
• Build a scalable application portal that can connect to future business tools

A solution designed around real field needs

Developed using an agile methodology, the solution now covers the full maintenance lifecycle:

• Viewing and creating maintenance notifications (preventive, corrective, inspection rounds)
• Entering work reports with text, catalog codes, attachments and photos, plus automated calculations for critical measurements
• Posting stock withdrawals directly from the notification or a standard work order
• Booking time to work orders for accurate traceability and cost allocation
• Creating measurement documents with automatic alerts when thresholds are exceeded

Every screen was co-designed with key users to ensure strong adoption on the shop floor. The priority was clarity, speed and offline robustness so technicians can work efficiently regardless of network availability.

Structured governance and rapid delivery

Led by the Storengy Maintenance Department, the project brought together a cross-functional HRC–Storengy team: business experts, functional analysts, SAP PM specialists, developers, architects and site representatives. Workshops were conducted on several sites to reflect actual field constraints.

In only six months, eight applications were delivered to production. The success relied on:

• A precise and comprehensive design phase (processes, UX, architecture)
• Eight agile sprints followed by structured business acceptance
• A detailed event log and carefully managed offline synchronisation

Key results

After years of mixed experiences with mobility tools, technician engagement had weakened. The new solution rebuilt trust by delivering an interface that is simple, intuitive and aligned with real operational needs.

Storengy now benefits from:

• More reliable and consistent field data
• Fewer errors, less re-entry and reduced paperwork
• Accurate tracking of time, measurements and stock movements
• Strong adoption thanks to a user-focused design
• Robust offline mode ensuring continuity even in remote or low-bandwidth areas
• Eight applications deployed in six months, establishing a strong foundation for the next steps in digitalisation
  
  

The next release will include an AI-based assistant to support field data entry and further accelerate technician productivity.