I have found this interesting video about the relation with suppliers. We talked about that in class and I found that this video matched a lot with the contents seen in class. In this video David Wohler explains that suppliers are part of the supply chain, so we have to exploit them because there is value in them and we can improve our performance. It is explained how they choose their suppliers and which are the benefits from them.
I hope you enjoy it! (Also, you can add subtitles in English if you don’t understand some words! For me it has been very convenient).