To me, a data driven argument is probably a losing battle. Punching a timeclock management like it's an assembly line is, in this context, likely to be more about control than productivity. If that's the company culture, and there are companies where it is, then the alternatives are compliance and its consequences, non-compliance and its consequences, or switching company cultures.<p>To put it another way, if there is strong buy-in from above, then the policy is likely to change when someone notices that a bunch of engineers have quit. If there isn't strong buy-in from above, then when your manager writes you up for not being there at 8am, the manager will get some training/coaching/mentoring/scolding.<p>But right now, the management didn't ask for staff's input when developing the policy, telling management they're wrong is unlikely to work.<p>Good luck.