Thermoplastic based additive manufacturing using the Fused Filament Fabrication (FFF) process is widely used from prototyping to the production of high-end structural parts. This is motivated by the wide range of thermoplastic materials available spanning form commodity and cheap thermoplastics (PLA, ABS, PETG…) to high performance thermoplastics like PEEK, PI, PEKK, PEI. However, it has been demonstrated that the FFF process is inducing anisotropy in the produced parts, meaning that the mechanical properties of the object produced differs depending on the printing strategy [1.2] (building orientation, layer thickness, raster angle, etc…). Currently, the tests and associated standard used to assess the produced part performance are based on existing standard like ASTM and ISO for mechanical performance assessment. However, recent works had shown that the performance of the evaluation of the performance of polymers are also highly dependent on the sample size and shape as well as the printing strategy leading to strong variation of the mechanical value obtained as function of the test sample shape and size (Figure 1). These variation in the assessed performance limit the design possibility and implies to implement for each material and 3D printer a specific qualification strategy. In this work we have investigated different strategy of test based on different approach in order to get reliable and reproducible data for several class of polymers. Results related to the assessment of tensile properties using samples either printed into the desired shape (ASTM / ISO) or extracted from a 3D printed plate will be presented. Effect of the printing strategy including infill type and amount of contour as well will be discussed. The conclusion of this work will be related to the proposition of a strategy and general guideline for the material/process qualification paving the way toward a specific standard as it as been done for metallic 3D printing.