Early forensic audio techniques were difficult to explain in court. Their applications received acceptance as well as rejection in alternate waves, determined by the rhythm judiciary and scientific communities have made their progressive steps. Time and court debates had to filter their available solutions by practically assessing both analysis techniques and evidence. Nowadays, forensic scientists consider using only coherent approaches that are balanced, logical, transparent and robust while still easy to explain to the intended audience. Forensic experts say interpretation of evidence needs to be done beforehand of analysis, for the client to have the necessary prognosis of the value of their submitted evidence. Through pre-assessment, the forensic laboratories obtain efficiency increases, on a basis of preliminary evidence relevance classification. The paper discusses and compares different objective criteria for case pre-assessment in forensic speaker recognition, based on the estimated quality parameters of the speech recording.