One of the guidance for creating value streams is to start with customer-based value streams2. Customer- based value streams are those that describe how an enterprise creates and delivers value for its external customers2. Starting with customer-based value streams can help to ensure that the value streams are aligned with the customer needs and expectations, as well as the enterprise's value proposition and strategic objectives2. Customer-based value streams can also provide a foundation for identifying and defining other types of value streams, such as internal or partner-based value streams.