| 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 |
| Six sigma - | (Software Engineering) a widely used strategy for statistical quality assurance |
| Software Requirements Specification - | (Software Engineering) a deliverable that describes all data, functional and behavioral requirements, all constraints, and all validation requirements for software |
| Software safety - | (Software Engineering) an SQA activity that focuses on the identification and assessment of potential hazard that may have a negative impact on the operation of software |
| State transition diagram (STD) - | (Software Engineering) a notation for behavioral modeling |
| Statistical quality assurance - | (Software Engineering) techniques for process improvement that are based on measurements of the product and the process |
| 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 |