The phrase "average service level" is correct and usable in written English.
It can be used in contexts related to performance metrics, customer service, or operational efficiency to describe a typical standard of service provided.
Example: "The average service level for our customer support team has improved significantly over the past year."
Alternatives: "typical service standard" or "mean service level".
ɛ: Lower average service level (lower bound).
Constraint (28) shows the assumed lower bound of average service level.
Green ratio (GR): in a particular transportation plan with a predefined average service level (SL), the GR is the proportion between two amounts of carbon emissions.
Figure 3a illustrates that with increasing the average service level (SL), total costs increase as a roughly exponential shape of (c = {c^* + (c_{hbox{max} } - c^* )} mathord{left/ {vphantom{{c^* + (c_{hbox{max} } - c^* )} {e^{{lambda (SL^* - SL }} }}}right.
We statistically estimated in 95%% percentile that improving average service level not only does not deteriorate the environmental factors, but also improves it at the best point, and specifically at the maximum of service level.
It is essential to note that the second objective of the model, i.e., maximizing the average service level is placed within the constraints due to deriving the Pareto front set, which can be obtained by frequently optimizing the model with various amounts of ɛ.
Open image in new window Fig. 3 a, b, c Pareto optimal line for total costs and total emissions vs. average service levels Open image in new window Fig. 4 Total distance and average utility ratio variances.
With increasing the average service levels up to possible maximum point, green factors at 95%% confidence level improves so that for the GR even at lower limit, 12%% increasing is showed.
As long as the speed is the only way for increasing the average of service level, the emission arises through raising the square of speed distance (Segment between 71 and 89 % in Table 4 and Fig. 6).
Adding 8.6 % to total costs will cause 87%% improvement for average of service levels.
Furthermore, this paper observes a number of bandwidth allocation schemes in the mutliservice Internet environment, and compares their performance by comparing the average connection utility the quality of service level which a user of an Internet application derives from the network performance.
