A control chart is a statistical graph that plots process data over time against a center line and control limits calculated from historical variation. It appears in manufacturing quality procedures, SPC training, and process-monitoring reports where teams use patterns such as shifts, trends, and out-of-limit points to distinguish common-cause variation from special-cause events that require appropriate investigation or corrective action.
In localization, control chart appears in SPC manuals, quality-system documentation, plant dashboards, and statistical software interface strings. Translators must handle terms such as upper control limit, lower control limit, subgroup, and special cause consistently, because these labels map to chart annotations, alarm rules, and audit criteria in manufacturing software.
A frequent error is translating control limits as 'specification limits' or 'tolerance limits,' or mixing them in the same text. Control limits come from process behavior, while specification limits come from customer requirements; confusing them can make an unstable process appear acceptable or trigger alarms for nonconforming product in translated SPC guidance.
The EU Machinery Directive requires documentation in the language of the destination market. Safety-related terms must map exactly to the wording of the governing standard.
Angel Translation locks terms like this into a project terminology base before expert review begins, so the same source term resolves to the same target term across every document in a submission — and stays consistent in the next revision. See the 8-step AI + expert workflow.
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