Before the 4pm meeting check with telops if SISPI instance and the GUIs were restarted. You could also do this by checking if they completed a "2 PM Checklist" in the eLog, or looking at the "Uptime" field in the Architect Console GUI.
Ask telops to point telescope to white spot and fire afternoon calibration scripts
Perform the Late Afternoon Checklist in the logbook
"Mark Exposures not to be processed"
Implement the data quality (= "fill out the Survey Table") If you didn't have a 4pm meeting, then you need to check with DESDM before doing the implementation if you think any of their true/false flags are erroneous. [ confession from Kathy R - this line was added because I tried to be too clever - sorry Robert, Klaus, 400+ DES members... ]
Make sure observers are present and roles are defined/understood