Develop a comprehensive IT equipment lifecycle management plan for [CompanyName], focusing on the efficient management of equipment from acquisition to disposal. The plan should cover acquisition, maintenance schedules, warranty tracking, upgrades, and eventual decommissioning. Include a timeline for each stage of the lifecycle, assigning roles to relevant departments such as [ITDepartment] for maintenance, [FinanceTeam] for budget approvals, and [ProcurementManager] for renewals. Ensure that the plan outlines specific processes for handling asset failures and unanticipated repairs. The output should be a detailed document that includes a timeline, responsibilities, and a budget overview for the full equipment lifecycle.