All the missing data that everyone pretends doesn’t exist.
Warning signs that indicate potential problems. The obvious warning signs that leadership will ignore until everything explodes. Usually first noticed by data team members who are promptly told, "That’s not a priority right now." By the time leadership acknowledges them, it’s already too late.
"I can’t put my finger on it, but asking for a ‘quick turnaround’ on a six-month project is a red flag."