Hay una gran cantidad de términos que son específicos de Lean y Six Sigma. Si no está seguro sobre el significado de un término, le recomendamos que visite nuestro Glosario Lean y Six Sigma para encontrar esa definición. Si no encuentra el término que está buscando, por favor contáctenos. Estaremos encantados de responder a sus preguntas, y podemos añadir su término al glosario en el futuro.


Total number of units handled correctly through the process step(s).


Variable used to signify factors or measures at the Output of a business process or system. Equivalent to “results.” A key principle of Six Sigma is that Y is a function of upstream factors; or Y = f(x).

X or Input

Variable used to signify factors or measures in the Input or Process segments of a business process or system.

Voice of the Customer, or VOC

Data (complaints, surveys, comments, market research, etc.) representing the views/needs of a company’s customers; should be translated into measurable requirements for the process.


Change or fluctuation of a specific characteristic which determines how stable or predictable the process may be; affected by environment, people, machinery/equipment, methods/procedures, measurements, and materials; any Process Improvement should reduce or eliminate variation. See also Common Cause; Special Cause.

Value-enabling activities

Steps/tasks in a process enabling work to move forward and add value to the customer but not meeting all three of the value-adding criteria; should still be scrutinized for time and best practices-can it be done better?

Value-adding activities

Steps/tasks in a process that meet all three criteria defining value as perceived by the external customer: 1) the customer cares; 2) the thing moving through the process changes; and 3) the step is done right the first time.


Processes (tasks, activities) occurring prior to the task or activity in question.