Many interviews with many managers, takes long time, long time is needed for the decision. The interviews with different mangers from different countries could be held at once, all of them ahve asked the same questions

Assessment centre day which was more of a introduction chat with all the candidates and then split to individual interview slots through the day. In the interview you do a roleplay of talking a customer through the uses of a product that they send you an info sheet for in advance. If successful you go to another interview with the regional managers and head of sales.