You can design curricula when you have background knowledge of the subject matter and the jargon, vocabulary items, needed to convey messages clearly and comprehend what is stated. Experience in the work field is also necessary to get acquainted with what is used in communication and in everyday situations.
First and foremost, you should perform a critical needs analysis to specify the points of conflict between the necessities defined by policy makers and the actual wants of the learners.Then you have to specify the linguistic requirements, the selection and gradation of content , format of presentation, and an evaluation component specifying the degree of success in the attainment of targeted goals.