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The development of subscriptions to mobile devices, in particular phones (more than 8.2 billion subscriptions in 2018: stats.areppim.com), as well as the enormous gains made by some companies through their mobile ticketing activity such as TRIPADVISOR that achieved a turnover more than 1,560 million USD in 2019 (source: TRIPADVISOR official website), represent the importance of this activity as a strategic choice for service companies. How then to develop a reliable measurement scale of thedoi:10.48374/imist.prsm/ame-v3i2.26248 fatcat:b4dwwarbo5hnbnqovukzepijqi