Hershey's faced significant challenges during its ERP implementation due to issues with legacy systems, a rushed 'big bang' approach, and data inaccuracies, resulting in delayed product deliveries and lost sales. After overcoming these setbacks, the company improved its inventory accuracy to 99.96% and reduced order fulfillment times to 24-48 hours. Today, Hershey's has successfully leveraged its ERP system to enhance operational efficiency and maintain its market dominance.