The line graph compares four different US-based car producers in terms of vehicle manufacturing time between 1998 and 2002, at one-year intervals.
Overall, throughout the period, all vehicle manufacturers experienced declines in car production time, albeit to varying degrees. Despite starting the period at an all-time high production time, Nissan witnessed noticeable drops over the subsequent years. Ford and DC showed similar patterns over the entire time interval.
In detail, Nissan commenced the period with the highest hours needed per vehicle manufacturing at substantial 37 hours in 1998, but this was followed by wild declines to just 24 hours over the ensuing two years. Then, the figure for Nissan continued to experience a further drop to 21 hours until 2002, placing it in fourth place regarding the transport production time. In contrast, General Motors began the time interval at 32 hours per vehicle, placing it in third but it experienced a gradual decline all over the period, as the numbers fell by nearly the same margin each year between 1998 and 2002 and finished the period at 24 hours.
The remaining car makers – Dalmier Chrysler (DC), and Ford – experienced mild fluctuations during the period. While the figures fell from 34 to 32 for DC between 1998 and 1999, the numbers rose for Ford remained intact during that time. Over the ensuing years, the figures for DC and Ford companies followed a similar trajectory, experiencing growth in numbers for the next three years, before witnessing small dips and finishing the period at 29 and 27 hours respectively.