Equipment

Using a volumetric mixer, because it supplies a steady stream of fresh concrete, the discharge is set at 6 pounds per second.  That's just over 6 seconds to fill the prevalent 16" x 24" mold to 38 pounds. The discharge gate is closed for 2 seconds while the full mold is replaced by a new one.  A timed solenoid actuated cylinder will open and close the gate.

Two shifts per day, 6 days a week, so 12 shifts per week

44 yards of concrete per shift = 172,800 pounds 

14.7 pounds per square foot of panel = 141,061 sq feet of panel produced

About 3 sf per mold on average, need 47,020 molds

If the total mold handling and processing time is 12 minutes, that's 0.2 hour

784 total hours needed, 7 hours per 8 hour shift productivity=112 workers