| Data dictionary - | (Software Engineering) a database that contains definitions of all data items defined during analysis; see also, Requirements dictionary |
| Data flow diagram (DFD) - | (Software Engineering) a modeling notation that represents a functional decomposition of a system |
| Data modeling - | (Software Engineering) an analysis method that models data objects and their relationships |
| Data objects - | (Software Engineering) an input or output that is user visible |
| Data warehouse - | (Software Engineering) a large, independent database that has access to databases that serve many different applications that are required by a business |
| Defect removal efficiency (DRE) - | (Software Engineering) a nondimension ratio (between 0 and 1) that provides an indication of the degree to which errors are removed from software before it is released to end-users |
| 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 |