tl;dr:Signs that your company is bottlenecked by an ineffective onboarding process, and best practice solutions: (1) New people cannot access tools and systems. (2) New developers cannot make a production deployment. (3) Newcomers feel orphaned. (4) Too much focus on individual work. (5) Not enough openness to change. (6) Seemingly simple things take too long. (7) Fast turnover. (8) Documentation can't answer questions from new hires.