| Design - | (Software Engineering) an activity that translates the requirements model into a more detailed model that is the guide to implementation of the software |
| Design specification - | (Software Engineering) a document that describes the design |
| Design walkthrough - | (Software Engineering) a formal technical review of the design |
| Detail design - | (Software Engineering) a design activity that focuses on the creation of an algorithm |
| Documentation - | (Software Engineering) descriptive information |
| Documents - | (Software Engineering) deliverables produced as part of the software engineering process |
| Domain analysis - | (Software Engineering) an object-oriented software engineering activity that attempts to identify classes that are relevant to an entire application domain, rather than a specific application |
| Effort - | (Software Engineering) the work-time product (e.g., person-days) associated with a project |
| Engineering change order (ECO) - | (Software Engineering) a mini-specification that describes the technical aspects of a change |
| Enhancement - | (Software Engineering) an extension of functional or performance requirements |