When it comes to describing a process or a situation as being strictly numeric, there are various synonyms for the term "by the numbers." For instance, you can use the following expressions: systematically, factually, methodically, precisely, exactly, mathematically, numerically, empirically, objectively, and concretely. These terms indicate that something is being done or considered using accurate and concrete data or measurable criteria, rather than being based on personal judgment or subjective opinions. Moreover, they suggest that the information is being analyzed in an objective, systematic and rigorous way, which is particularly important in fields such as science, business, finance, and statistics.