Scholars in business and technical communication have continuously made efforts to look for effective teaching approaches for cross-cultural business and technical communication; however, little research has been conducted to study the process by which students develop intercultural competence; fewer studies have been conducted to assess learners' needs for gaining intercultural competence in the globalization age. To assess students' level of intercultural competence and understand whether they are likely to change in response to teaching, I first introduce a two-part framework for teaching and learning intercultural business and technical communication: the DMIS model--Developmental Model of Intercultural Sensitivity, and the related instrument to assess intercultural sensitivity--the Intercultural Development Inventory (IDI). Then I report the results of using the framework to assess and develop students' intercultural competence, and conclude the study by emphasizing the significance of the current empirical research and discuss the framework's limitations.