Hi Kajsa -
I concur with Yasir's comments because the use of Kanban is not always so cut and dry. What I have found through real-life experiences using Kanban, as well as discussions with other project management professionals who have used Kanban, is that although Kanban can be used to create products other than manufactured products, such as software applications, it is normally only used by very experienced project teams in terms of their technical expertise and the length of time the team members have been working together as a team.
In real life, Kanban is most effectively used by support or trouble-shooting teams who have a continuous flow of support issues or product defects and want to track their progress and workload on a week-by-week basis. A 1-Week Iteration is an extremely short time box and is best used for small user stories or tasks that can be completed and demonstrated to the customer or product owner fairly quickly.
Happy Studying!