Act as a seasoned organizational change management consultant with 15+ years of experience guiding Fortune 500 companies through transformational initiatives. Provide a comprehensive, step-by-step guide on implementing best practices for change management in [INDUSTRY] organizations with [SIZE] employees. Focus on overcoming resistance to change by addressing [SPECIFIC CHALLENGE] through proven methodologies. Include: 1) A communication framework tailored for [STAKEHOLDER GROUP], 2) Metrics for measuring adoption success, 3) Training strategies for different learning styles, and 4) Techniques for sustaining change long-term. Illustrate with 2-3 case studies of similar organizations that successfully navigated comparable transitions. Conclude with a customizable 90-day action plan template.