Develop a Comprehensive Project Requirements Gathering Plan

As an experienced Project Manager, you need to develop a detailed plan for gathering comprehensive project requirements for a new e-commerce platform development project. Outline the key steps from stakeholder identification to requirement validation.

**Role**: Project Manager
**Context**: Initiating a new e-commerce platform development project and needing a structured approach to requirements gathering.
**Specifics**: Include methods for stakeholder identification (e.g., interviews, workshops), techniques for eliciting functional and non-functional requirements (e.g., user stories, use cases, performance criteria), documentation standards, and a validation process (e.g., reviews, sign-offs).
**Output**: A structured plan with headings and bullet points for each stage of the requirements gathering process.