
GRIF: a software suite to serve our businesses
Developed at the CSTJF in Pau about forty years ago, GRIF (GRaphical Interface for reliability Forecasting) is a reference software suite designed to run RAMS (Reliability - Maintainability - Availability - Safety) dependability studies. Since its creation, the tool has been constantly evolving and is now used in all the TotalEnergies transition projects.
Developed in the 1980s at the Jean Féger Scientific and Technical Center (CSTJF) in Pau, GRIF is a software suite that models complex systems, to optimize the security of facilities, secure costs and assess production availability levels (Production Availability Study – PAS). GRIF embodies mature, efficient calculation engines that meet the most complex study requirements, whatever the sector of activity.
GRIF comprises 12 separate modules for customized modeling depending on the specificities of the system being studied. They include block diagrams, Markov graphs and Petri networks, providing a modular architecture that can be adapted to a wide range of projects and simulations.
The advantages of GRIF
- Reliability of calculations: Rigorous mathematical methods to guarantee full integrity of analyses.
- Compliance with standards: GRIF meets the requirements of international standards, ensuring optimal compatibility with industrial practices.
- Sectorial adaptability: Thanks to its generic, flexible models, GRIF applies to any sector that requires an in-depth reliability and availability analysis.
- Continuous development: GRIF regularly incorporates new, innovative modules like Bstok (2006), SIL (2010), Etree (2012), Petro, Bool (2013), Risk and Flex (2018), which consolidate its position among the most efficient decision-making tools on the market.
The GRIF software suite is ideal for the analysis of complex problems, owing to the diversity of modeling languages it has. Extremely versatile and customizable, it guarantees accurate, reliable calculations.
Reliability Engineer - Reliability Availability Maintainability - Pau

On the market since 2005, the GRIF software suite has won over large industrial groups by its computing power and the flexibility of its environment. The aim is to guarantee the reliability and availability of critical systems. Over 300 licenses have already been sold, and GRIF fully intends to extend its scope of application to the renewable energies sector, in particular through the development of a module devoted to offshore wind turbines.
Called "Wind", this new block is based on mass data collection to model marine logistics and estimate operating expenses (OPEX) as accurately as possible, factoring in several parameters that include unexpected weather events, sea conditions, failure rates, etc. Based on these data, the software simulates thousands of scenarios to fine-tune production availability. Based on the same principle, the teams at the CSTJF in Pau used GRIF to run a reliability study on CO2 capture and storage as part of the Aramis project.
Alongside that, the GRIF software suite continues to support Oil & Gas industries in their transition, in particular by helping them reduce their CO2 emissions.

Master 1 Mathematics students from the UPPA discover career prospects
Academic partnerships are one illustration of TotalEnergies’ commitments to youth. Tours and immersion workshops with GRIF at the CSTJF in Pau.

When mathematics catalyze the energy transition…
From the TotalEnergies Site in Pau, Maïder Estécahandy leads the GRIF project. She’s a reliability engineer and decodes a profession where complex calculations play a central role in the context of the energy transition.