1) Firstly you are going to get a telephonic HR round, in which they ask pretty basic questions about why do you want to join Telus, What are your short term and long term plans, salary expectations etc.
2) Case Study is the most tricky round. You must nail it in order to get to the interview round. One interview happens immediately after the case study. The cases are either from Harvard, Ivey or any other good college, or a live case.
3) 1 or 2 interview rounds depending upon number of applications