A user’s prior experience with digital technologies predicts their success with a novel digital interface. Consequently, low technology prior experience can cause a potential user to be excluded from successfully navigating a user journey with a digital interface. The Engineering Design Centre’s exclusion calculator can predict the percentage of a population who will be unable to complete a task step in a user journey, but it does not explicitly take into account user exclusion due to insufficient technology prior experience. This paper develops the rationale for a proposed method for assessing the digital inclusivity of a digital interface user journey through evaluation of explicitness and digital interaction pattern familiarity.