I agree with what has been said so far. The design input is the document that provides the basic requirements of the product. It takes the input from different sources like marketing, sales, direct team, customers in order to obtain the general idea for what is in demand within the market. The customers provide the input due to needing the specific product, the sales team are constantly interacting with customers and can provide feedback based on multiple customer’s concerns or suggestions. And marketing can work to understanding the trends by conducting market intelligence research to see if the possible product would provide benefit to the customer and also if it will fulfill a business need. Some examples of feedback that can help make the DID are: the product being portable, the ideal size and weight, possible temperature requirements, etc. These ideas and suggestions are then used as a helpful guide to understanding and working to identifying the need and use for the product. One thing to keep in mind is that most of the details for the product are all broad. Only until the product the DSD (design specification document) is when more of the exact dimensions and details of the product are written into the document.

Luisa