In periods of excess capacity, does it make sense for a manufacturing company to produce some products to stock (i.e., build up inventory) for sale in future periods of high demand? Give two examples...

In periods of excess capacity, does it make sense for a manufacturing company to produce some products to stock (i.e., build up inventory) for sale in future periods of high demand? Give two examples of industries where this might be a good idea. Give two examples where it might be a bad idea.