Production of the appropriate word requires selection of the correct lexical representation and its corresponding segments amongst competitors, as well as processes that monitor planned speech to detect and correct deviations from the intended word. I will discuss two types of control processes required during selection and monitoring phases. Selection-internal control can be studied when selection is made difficult by introducing competitors that are similar to the target. Selection-external control can be investigated when a selected prepotent response must be overridden in favor of a new response. I will present evidence pointing to a dual control system with different degrees of specificity to the stages of word production.