first solve all your issues in your factory then you can ask it from your suppliers,
This review is from: Seeing the Whole Value Stream (Paperback)
I have read a Turkish translation.
In Turkey I found it is not very easy to ally with suppliers. Supply Chain notion has not been well established in Turkey yet.
We need to sort all issues in our factory first.
I suggest this book only after having continuous flow cells, learning to see (Value stream maps) and leveling books.