When using allocated costs for decision making, we assume that capacity costs will change in proportion to changes in the cost driver. How can a company validate this assumption when it chooses cost...

When using allocated costs for decision making, we assume that capacity costs will change in proportion to changes in the cost driver. How can a company validate this assumption when it chooses cost drivers? (Hint: Consider the techniques we used in Chapter 4 to determine the link between activity volume and variable costs.)