Taco Bell's DSS

Read this article, and answer the following questions:

1. What was the business problem(s) to which they were seeking solutions?
2. Specifically, what were the business decisions they were facing? Formulate each as a question.
3. Explain why (in what sense) the above decisions were complex, requiring a sophisticated approach to tackling them.
4. In a paragraph, describe what approach was taken to tackling the above decisions. Keep the language simple enough so that any Taco Bell executive would be able to understand it.