I would like to know how “hours per car” is worked out.
Herbert Diess: (from Electrek article):
“And in Brandenburg, Tesla wants to build half a million cars with 7,000 people – direct and indirect. And with an impressive productivity: expected 90 units per hour in one line, 10 hours per car.”
500,000 cars per year produced by 7,000 employees, direct and indirect, is 500,000/7000=71.4 cars per employee.
Assuming 8 hour days, 5 days a week for 52 weeks, then man-hours is (8 X 5 X 52)/71.4= 29.1 hours per employee per car.
I suppose hours per car are not necessarily man-hours alone, but what else? The figures he gives should be meaningful in an equation.
Maybe his calculation somehow comes from “90 units per hour in one line”. Assuming 2 shifts: 90 X 16 X 365 = 525,600 per year, which works. But that only accounts for 40 seconds per car. Obviously, additional time must be spent by the 7,000 employees (direct and indirect) on off-line tasks. In that case, it’s still 29.1 man-hours per car.
Any suggestions?
driveteslacanada.ca
www.bbc.com
