Why is knowing (or estimating) the product demand so crucial

Why is knowing (or estimating) the product demand so crucial

Why is knowing (or estimating) the product demand so crucial for a firm? In your response, include an example of a U.S. business that has suffered from poorly estimating the demand of its products. Evaluate how or why the business made such a mistake. (Include at least 2 cited references in APA 6th edition format. Assignment length should be 250-300 words)