Final answer:
The option that is NOT commonly considered a phase of the SDLC is 'Requisition phase'. The standard phases include requirements analysis, system design, implementation, testing, deployment, and operations and maintenance.
Step-by-step explanation:
The Software Development Life Cycle (SDLC) is a process used for planning, creating, testing, and deploying an information system. Among the choices given, the option that is NOT commonly considered a phase of the SDLC is a. Requisition phase. The typical phases of the SDLC include:
- Requirement gathering and analysis
- System design
- Implementation or coding
- Testing
- Deployment
- Operations and maintenance
Each of these phases plays a crucial role in ensuring that the developed software is reliable, efficient, and meets the user's needs. The requisition phase is not a standard term used in the context of SDLC; this term may be confused with either the requirements analysis phase or the initial project initiation steps.