| Paper prototype - | (Software Engineering) a paper representation of an application (e.g., story boards that describe the interaction at a human interface) |
| Perfective maintenance - | (Software Engineering) enhancement, |
| Productivity - | (Software Engineering) work output per unit time |
| Project scope - | (Software Engineering) a statement of basic requirements of the software to be built |
| Project size - | (Software Engineering) an indication of the overall effort to be expended or the number of people working on the project |
| Regression testing - | (Software Engineering) tests that are conducted repeated to ensure that a change has not introduced side effects |
| Reliability - | (Software Engineering) a measure of the degree to which software operates reliably over some period of time |
| 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. |
| Scope - | (Software Engineering) a bounded statement of what must be accomplished |