The bar chart illustrates the amount of time US automakers, Ford, General Motors, Chrysler, and Chevrolet, spent on vehicle production between 1999 and 2008, measured in hours per vehicle.
Overall, it is clear that all four companies managed to reduce the time required to produce a single vehicle over the given decade. Each automaker showed a consistent decline in production hours across the period.
In 1999, General Motors had the highest production time at 30 hours, which then steadily decreased to 27 hours in 2002, 24 hours in 2005, and finally 22 hours by 2008. Ford followed a similar pattern, starting at 28 hours in 1999 and reducing its time to 25, 22, and ultimately 20 hours in the respective years. Both companies achieved a total reduction of 8 hours over the ten-year period.
Chrysler and Chevrolet also experienced reductions in their production times. Chrysler began at 27 hours in 1999, falling to 24 hours in 2002, 21 hours in 2005, and ending at 19 hours in 2008. Chevrolet started slightly higher at 29 hours in 1999, decreasing to 26, 23, and 21 hours in the following intervals. Chrysler recorded the lowest production time overall in 2008.