The avatar describing Hexflow® RTM6 resin system is proposed via a data-driven three-dimensional representation of resin viscosity measurements for the early stages of the liquid composite moulding process. The proposed approach facilitates the exchange of relevant information regarding resin behavior and input datasets for process modelling of liquid composite moulding. The proposed approach provides a step-by-step procedure to update the digital avatar describing the resin system. This work describes a digital avatar as an equivalent informative representation of the resin, maintained in digital form and easily interpreted and updated by humans or Artificial Intelligence applications. The case study for an aerospace graded resin illustrates the procedure to generate and update resin avatars. The proposed digital approach minimizes intervention on experimental input datasets and reduces the overall cost of process modelling datasets postprocessing. The proposed digital approach is based on a chain of specific steps applied to generated and vetted measurements of resin viscosity. These values are translated into a suitable material avatar, which is the single source for all input datasets required for numerical or analytical modelling for industrial processes and applications. The material avatar is then used to represent the process window with the advantage of a three-dimensional representation of viscosity measurements. This experimental reinforced approach is introduced here as Legit data-driven , Informative, Robust Approach (LIRA) aims to standardize experimental datasets sourced from material characterization enabling automated calculation of the input datasets, which are then fed into numerical analyses resulting in a robust and accurate simulation. With the aim to validating the proposed approach inclusive data generation, data representation onto the avatar and use of the avatar to extract relevant input datasets required for numerical process modelling the proposed approach is applied to a test case of a composite panel and a step-by-step procedure for the workflow detailed in this work.