Originally Posted by BingBongBoy

The way it was explained to me... is similar to the way we are charged for catering. Everything is based on the number of "movements" it takes to handle the items.

So, although the weight is XXkg per piece of luggage, it is more about the manpower and other aspects that have to be taken into consideration.

For example, your total allowance is 69kg in your example given, however, if you were to check in 10 items all weighing 6.9kg, yes, you would be in your weight, but the amount of manpower to shift the individual items would be more.

I fully see your point, but weight is not the deciding factor, although an important one.