Which phase consumes the maximum effort for developing a typical software product in waterfall model?

In the waterfall model, the phase that consumes the maximum effort is typically the implementation or coding phase. This phase involves translating detailed design specifications into actual code, which requires substantial development time and resources. Additionally, this phase often includes debugging and testing to ensure the software meets the specified requirements, further contributing to the overall effort. Proper planning and execution during this phase are crucial for the project’s success.