agency app big software company bottlenecks case study ebook employee burnout employee development estimation flexible planning global company marekting milestones multilocation planning pm PM tips project management project manager project onboarding project planning project resource management remote work reports resource allocation resource calendar resource management resource management guide resource management tools resource planning resource utilization scheduling techniques software house strategy teamdeck team management time management timemanagement timesheet management timesheets time tracking timetracking toolbox tools workload management