Final answer:
A 2-week sprint is not a phase of the traditional SDLC, or waterfall model; it is a concept from Agile methodologies like Scrum.
Step-by-step explanation:
In the context of software development, the traditional SDLC, or waterfall model, consists of a linear and sequential approach that includes the following phases: requirements analysis, system design, implementation, testing, integration, and maintenance. Among the options provided, the one that is NOT a phase of the traditional SDLC is d. 2-week sprint. A 2-week sprint is a concept from Agile methodologies, specifically Scrum, which is an iterative and incremental approach to software development, in contrast to the linear progression of the waterfall model.