| Requirements engineering - | (Software Engineering) the activities required to elicit, elaborate, negotiate, specify, and validate system or software requirements |
| Resources - | (Software Engineering) anything that is required to get the project done, people, hardware, materials, information, etc. |
| Reusability - | (Software Engineering) the ability to reuse an already-existing program component in another application |
| Reusable components - | (Software Engineering) configuration items that are reusable |
| Reverse engineering - | (Software Engineering) trying to develop design models or an understanding of design using program code as a starting point |
| Risk - | (Software Engineering) a potential problem or occurrence that put a project in jeopardy |
| Risk analysis - | (Software Engineering) a techniques for identifying and evaluating risks |
| Risk Management and Monitoring Plan (RMMP) - | (Software Engineering) a plan for mitigating, monitoring and managing risks |
| Scheduling - | (Software Engineering) the activity that lays out a timeline for work to be conducted on a project |
| Scope - | (Software Engineering) a bounded statement of what must be accomplished |