The document discusses using value stream mapping (VSM) and voice of the customer (VOC) techniques to improve a business. It defines VSM as mapping the actions required to deliver a product or service to a customer. A current-state VSM identifies waste, while a future-state VSM sets goals for improvement. VOC involves interviewing customers to understand their needs and experiences in order to guide improvements. The document provides an example interview guide for a VOC project aimed at understanding customer requirements for an aircraft manufacturing company.