| Spiral model - | (Software Engineering) an evolutionary software engineering paradigm |
| Stakeholders - | (Software Engineering) any person of group that has a stake in the successful completion of a software project |
| State transition diagram (STD) - | (Software Engineering) a notation for behavioral modeling |
| Stepwise refinement - | (Software Engineering) a technique for accomplishing functional decomposition or procedural design (also called partitioning) |
| Stress testing - | (Software Engineering) a testing task that determines how software responds when it is forced to meet or exceed operational limits |
| System engineering - | (Software Engineering) focuses on the analysis and design of all elements of a complete product, service, or technology for the transformation of information or control |
| Task analysis - | (Software Engineering) a software engineering action that is conducted as part of user interface design; intended to better understand how a user is to interact with a system |
| Task set - | (Software Engineering) a collection fo software engineering tasks that are required to complete an activity or action that is part of a software process framework |
| Test cases, derivation of - | (Software Engineering) the creation of data that can be used to uncover errors in the software |
| Test plan and procedure - | (Software Engineering) a description of testing strategy and tactics |