The Sea Gull Paper Plane. The Sea Gull paper airplane is also a unique Delta Wing design and a tucked nose create this elegant looking craft that is a slow long distance floater. This variation on a traditional glider design will float straight and far when folded well.
Product managers often start with a product requirements document (PRD). A product requirements document defines the product you are about to build: It outlines the product's purpose, its features, functionalities, and behavior. Next, you share the PRD with (and seek input from) stakeholders - business and technical teams who will help build, launch or market your product.
For a sense of where the functional specification fits into the development process, here are a typical series of steps in developing a software product: 1  Requirements. 2  Objectives. 3  Functional specification. 4  Design change requests. 5  Logic specification. 6  User documentation. 7  Test plan. 8  The final product.