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"SDLC is the Software Development Life Cycle. The V-Model is one approach, shaped like a ‘V’ to show development on the left and testing on the right. Every stage of building — from requirements to design — has a matching test stage, allowing early bug detection and high quality results. It works best for stable, safety-critical projects, like a cardiac pacemaker. The V-Model is clear and reliable, but less flexible if requirements change."