Build a 90-Day Consulting Engagement Extension and Upsell Plan

This prompt delivers a battle-tested build a 90-day consulting engagement extension and upsell plan designed for consulting professionals who need to create visible, measurable impact within the critical first 90 days. Generates a strategic plan for extending an existing consulting engagement and identifying upsell opportunities within 90 days of engagement start. The 90-day timeframe is deliberately chosen: it's long enough to achieve meaningful outcomes but short enough to maintain urgency and accountability. Research from leading consulting firms consistently shows that engagements that fail to demonstrate value within the first 90 days rarely recover — client confidence erodes, stakeholder attention shifts, and momentum becomes impossible to rebuild. This prompt structures the plan around three 30-day cycles, each with its own theme: foundation (Month 1), execution (Month 2), and consolidation (Month 3). Within each cycle, weekly milestones ensure that progress is visible and deviations are caught early. The plan includes not just what to do, but how to manage the human dynamics — stakeholder communication, resistance management, and organizational energy. The output includes practical tools: milestone trackers, RACI matrices, risk registers, and scorecards. These are not academic exercises but working documents that consulting teams use daily to stay on track and demonstrate progress to clients and sponsors. Whether you're launching a new engagement, building a practice, recovering a relationship, or driving organizational change, this 90-day plan provides the structure, accountability, and strategic sequencing that separates successful consulting interventions from failed ones.