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Chapter 16: Economic Analysis of the SLA... > FUTURE RESEARCH DIRECTIONS - Pg. 324

Economic Analysis of the SLA Mapping Approach for Cloud Computing Goods Average Net Utility Table 3 shows the average overall utility, average overall cost, and the average overall net utility for all three adaptation methods. The averages are calculated over all iterations. The maximum method has achieved the highest average overall utility. It satisfies the largest number of users. However, since it also incurs the highest costs, it becomes the method with the lowest average overall net utility. The threshold method does slightly better with respect to the average net utility than the maximum method. This is due to the zero cost. The thresh- old method (with a high threshold) stays with the initial SLA attribute name for the public SLA template. The best adaptation method with respect to the average overall net utility is the maximum- percentage-change method. We observe that the the cost of creating SLA mappings frequently, the introduction of heuristics into the adaptation meth- ods is helpful. Our results show that a significant reduction of costs can be achieved while preserv- ing the benefit of adapted public SLA templates. FUTURE RESEARCH DIRECTIONS Our future work will comprise an analysis of whether determining groups of users coming from different domains can increase the overall net utility even further than the maximum-percentage- change method. Furthermore, we will investigate other metrics (besides the quantity based mapping count) for the adaptation methods. This could be the number of SLAs newly established. CONCLUSION