The graph represents the amount of hours spend for production of one machine by four companies over a 8-year period from 1999 to 2006. Such as Audi, Mercedes, Volvo, Nissan.
It can be clearly observed that the figures for Nissan and Volvo started grown at 20% and approximately 23%.Volvo vehicle remained stable between 1999 and 2006.Nevertheless Nissan company had fluctuations, first, the figure did not change and remained at 20 hours between 1999 and 2002.And then rose slightly of 20 to 23 and line intersected with Volvo.
In addition Audi automobile dropped significantly in contrast of all companies,and fell down around 33 to 25 hours over the entire period, and also intersected with Mercedes’s line at 2002.According to the graph, the Mercedes service increased marginally from 25 to 27 of four years.And then had a little reduction of 27 to 23.Overall, these all four corporate vehicles had the steadiness in 2006 of 23 hours.
