| 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 |
| Debugging - | (Software Engineering) the activity associated with finding and correcting an error or defect - a lack of conformance to requirements found in the software after delivery to the customer |
| Engineering change order (ECO) - | (Software Engineering) a mini-specification that describes the technical aspects of a change |
| Errors - | (Software Engineering) a lack of conformance found before software is delivered to the customer |
| Estimation - | (Software Engineering) a project planning activity that attempts to project effort and cost for a software project |
| Extreme programming - | (Software Engineering) an agile process model that emphasizes scenario-based planning, incremental delivery, refactoring, pair programming and continuous testing. |
| Factoring - | (Software Engineering) a technique that distributes control and work in a top-down manner within a software architecture (used a part of structured analysis) |
| Formal technical reviews - | (Software Engineering) a structured meeting conducted by software engineering with the intent of uncovering errors in some deliverable or work product |
| Functional decomposition - | (Software Engineering) a technique used during planning, analysis and design; creates a functional hierarchy for the software |