Data processing method implemented by a computing device, including: a step of generating a control signal for the display, on a screen, of a graphical interface comprising a graph composed of links and of nodes depicted by vignettes, each vignette representing an entity, said graph containing a first vignette representing a first entity; a step of selecting a set of entities on the basis of at least one second selection criterion from among a plurality of entities that meet a first selection criterion relative to the first entity; the first vignette of said graph being linked, in said graph, directly to one or more second vignettes (V21, V22) that each represent an entity of said set of entities, the second criterion being dependent on a current threshold value determined on the basis of the plurality of entities that meet the first criterion, said current threshold value being a value of a predefined quantity, at least one value of said quantity being associated with at least one entity, and said at least one second criterion being a criterion of comparison between a value of said quantity associated with an entity and said current threshold value, characterized in that the graphical interface contains an icon that comprises at least two areas that are selectable by a user, each area being associated with a threshold value, and in that, when the user selects one of said at least two areas of the icon, the current threshold value is replaced by the threshold value associated with the selected area, and the selection of said area is followed by the display of a modified graph containing a modified number of said second vignettes. a step of generating a control signal for the display, on a screen, of a graphical interface comprising a graph composed of links and of nodes depicted by vignettes, each vignette representing an entity, said graph containing a first vignette representing a first entity; a step of selecting a set of entities on the basis of at least one second selection criterion from among a plurality of entities that meet a first selection criterion relative to the first entity; the first vignette of said graph being linked, in said graph, directly to one or more second vignettes (V21, V22) that each represent an entity of said set of entities, the second criterion being dependent on a current threshold value determined on the basis of the plurality of entities that meet the first criterion, said current threshold value being a value of a predefined quantity, at least one value of said quantity being associated with at least one entity, and said at least one second criterion being a criterion of comparison between a value of said quantity associated with an entity and said current threshold value, characterized in that the graphical interface contains an icon that comprises at least two areas that are selectable by a user, each area being associated with a threshold value, and in that, when the user selects one of said at least two areas of the icon, the current threshold value is replaced by the threshold value associated with the selected area, and the selection of said area is followed by the display of a modified graph containing a modified number of said second vignettes.