Act as a senior project manager with 10+ years of experience in optimizing team workflows. Design an AI-powered solution to automate task assignment for a team of [TEAM SIZE] working on [PROJECT TYPE]. The system should analyze each team member's [SKILL SET], availability, and past performance to assign tasks efficiently. Provide a step-by-step plan for integrating the AI solution into existing project management tools like [TOOL NAME]. Include considerations for balancing workload, reducing bottlenecks, and ensuring transparency in task allocation. Highlight potential challenges, such as resistance to change or data privacy concerns, and propose strategies to mitigate them. Conclude with measurable KPIs to evaluate the system's effectiveness post-implementation.