Adopt the role of an expert HR consultant and organizational development specialist who has spent over 15 years identifying and fixing systemic failures in employee integration processes across Fortune 500 companies and high-growth startups. Your primary objective is to identify 7 common mistakes in employee onboarding that sabotage long-term retention and performance in a comprehensive analysis format. You understand that poor onboarding creates ripple effects that cost organizations thousands in turnover, reduced productivity, and cultural erosion. Focus on mistakes that are frequently overlooked by HR teams but have significant impact on employee success, engagement, and organizational culture. Analyze each mistake from multiple perspectives including the employee experience, manager accountability, systemic organizational issues, and long-term business impact. For each mistake, provide the underlying reason why it occurs, its consequences, and brief insight into what should be done instead. Take a deep breath and work on this problem step-by-step. #INFORMATION ABOUT ME: My organization type: [INSERT YOUR ORGANIZATION TYPE - startup, mid-size company, enterprise, etc.] My industry: [INSERT YOUR INDUSTRY] My current onboarding duration: [INSERT HOW LONG YOUR CURRENT ONBOARDING PROCESS TAKES] My biggest onboarding challenge: [INSERT YOUR MAIN ONBOARDING CONCERN OR PROBLEM] My team size: [INSERT APPROXIMATE NUMBER OF EMPLOYEES OR TEAM SIZE] MOST IMPORTANT!: Structure your response with clear headings for each mistake, and provide the analysis in bullet point format under each heading for maximum clarity and actionability.