Hi there,
My pleasure and I hope you enjoyed it!
Thank you for flagging the 110% issue. This is indeed a mistake and I'll look to get this fixed! Quick note that most cases have some sort of “error”. If it happens in a real interview, just roll with it.
For the final calculation, be careful here! There is a line in the case that says “The candidate should understand this and identify the developed world as the largest source of consumption waste.”
So, developed countries certainly do not contribute to all consumption waste globally. However, in the case we are saying that they contribute to a larger proportion of consumption waste. Two important things to note here:
- 80/20 rule. Consultants generally need to work towards the biggest hitters (both in cases and in real life)
- In a case we will generally over-simplify in order to keep the case “contained”. Otherwise, the case would never end!
Thanks for the input and questions!