This communication aims at presenting and discussing a developmental intervention performed during the design process of an artefact. We name our method “artefact based learning laboratory”. The term “laboratory” refers to the conditions needed to perform the intervention within an organisation. The term “artefact based learning” means that we organized the design process as a dialogical mutual learning process between users and designers (Béguin, 2003). The artefact here is as a software prototype meant to enable the analysis of large data sets collected on field experiments which are set up to assess wheat cultivar performance against various environmental conditions.