The line graph provides data on the hours required to produce a vehicle by four US-based car manufacturers – Nissan, Daimler Chrysler (DC), General Motors (GM), and Ford, between 1998 and 2002.
From a general perspective, there was a noticeable decline in production time for Nissan and Ford, while GM and DC tended to show more fluctuation throughout the period. Eventually, Nissan became the most productive company in terms of manufacturing time. It is indicated from the graph that GM and DC still managed to achieve comparable progress regardless of Nissan and Ford’s surpassed improvement.
In 1998, Nissan appeared to have the longest production time among the four companies mentioned, approximately 36 hours for a vehicle. Nevertheless, this brand witnessed a dramatic decrease to 22 hours by 2002. Correspondingly, Fords followed a similar tendency initially, with 26 hours for transportation manufacturing and dropped steadily to 21 hours, overtaking Nissan in 2001, but declining slightly behind by the end of the duration.
Conversely, General Motors (GM) exhibited a fluctuating pattern, beginning at 32 hours in 1998, peaking at 34 hours by 2000, and reducing to 30 hours in 2002. In the meantime, Daimler Chrysler remained a relatively stable trend, surging nearly 30 hours from 1998 to 2002, with only minor variation.