Economic Growth

Executive Summary

In the modern economy, statistic technique is an important component in the success of a business to maintain a high quality of service and to avoid any inefficiency. This report is prepared to evaluate the efficiency of mechanics and the reputation of consumers in order to maximize the chance of repeat business of AllRepairs. The analysis is based on 293 randomly selected samples from the company’s record, by which include 4 types of mechanics, time used by each worker, 3 levels of difficulty, Satisfaction by customers and number of years the mechanic has been with AllRepairs. Comparing the time it takes repair staff as the mean to earn the efficiency of them and determining whether the percentage of consumers Satisfaction is reaching the aim rate which is at least 80%. To determine whether the AllRepairs is successful in meeting the target business plan, statistic technique will be used to evaluate the following two indicators:

Overall and individual efficiency of mechanics in AllRepairs.

At least 80% of their customers should be either satisfied or very satisfied with the services provided.

First of all, following content analysis the efficiency of repair mechanics measured by the time it takes them to undertake their assigned jobs in different level of difficulty.

Easy level

According to the selected samples, figure 1 shows statistic data under the easy working level, mechanic 1 and 4 take the fewest average time to finish the work under easy level (see Figure 1), but take a overview of average time, it shows there is no large gap between those two mechanics. Moreover, the table in figure 1 will be associated with to process a more accurate conclusion. Technically, the standard deviation is used to measure variability. In other words, lower standard deviation shows a more stable situation. In figure 1, it shows that Mechanic 1 has a lower standard deviation which is 4.11 compare with mechanic 4 which is 4.96. On the position of similar average time, mechanic 1 do the easy level work more efficiency because a more stable situation. It could be described as a low-risk alternative.

Figure1: Figure of each mechanic’s assigned work of easy level

Standard level

On the other hand, as figure 2 shows below, it can be concluded that mechanic 1 and 4 have the lower average time doing the standard level works. However, the standard deviations of mechanic 4 is 9.85, which is higher than mechanic 1 (9.21). Base on the standard deviation conclusion mentioned above, AllRepairs have to take low-risk to assign mechanic 1 to do standard level works. Thus, mechanic 1 is most efficiency under standard level of works.

Figure2: