# A Dynamic Decision Support System for Selection of Cloud Storage Provider
## 5 Results and Discussion
### Comparison with Existing Models  
Finally, functionality of the proposed system is compared with previous systems. Most of the previous studies are conceptual, and still their implementation is not possible because they were introduced between 2000 and 2015, and at that time, cloud storage providers had different offerings as well as technology. Another flaw in these systems is lack of vendor's recommendations. Previous research dealt with the customer's requirements as a study from the social and economic aspects. Table 28 presents a comparison of the proposed system with the previous research work.  
Cloud Genius and SMICloud have used AHP, the same as the proposed system. After getting user requirements, all potential pairs of parameters are calculated. All frameworks use multiple criteria, but the proposed system considers fewer parameters than SMICloud as well as Cloud Genius and focuses on the critical parameters like performance and cost because of major impact on the ranking. Accuracy and Dynamic database functionality are the other edges of the proposed system.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Cloud** & **CPU** & **Sharing** & **Rep** & **OS** & **Mobile** & **Free** & **Trial** & **SYN** & **Ranking** & **Cost** \\
**Vendors** & **[Cores]** & **Sharing** & **Rep** & **OS** & **Mobile** & **Access** & **Storage** & **Trial** & **SYN** & **Ranking** & **Cost** \\ \hline
**Sync.com** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0034 & 0 & 0.045 & 0.3674 & 4.08 \\
**JustCloud** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0023 & 0.0022 & 0.045 & 0.4065 & 10.69 \\
**Dropbox** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0 & 0.0034 & 0.045 & 0.3674 & 4.96 \\
**Tresorit** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0 & 0.0022 & 0.045 & 0.4042 & 15.42 \\
**LiveDrive** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0 & 0.0022 & 0.045 & 0.3662 & 5.01 \\
**pCloud** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0 & 0 & 0.045 & 0.402 & 3.99 \\
**hubiC** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0070 & 0.0034 & 0.045 & 0.4124 & 5.00 \\
**Jumpshare** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0023 & 0.012 & 0.045 & 0.4163 & 4.12 \\
**iCloudDrive** & 0.018 & 0.005 & 0.057 & 0.017 & 0.007 & 0.0034 & 0.012 & 0.005 & 0.1244 & 3.05 \\
**MediaFire** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0050 & 0 & 0.045 & 0.369 & 2.50 \\
**OpenDrive** & 0.018 & 0.005 & 0.057 & 0.147 & 0.079 & 0.0034 & 0 & 0.005 & 0.3144 & 4.17 \\
**SugarSync** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0034 & 0.0034 & 0.045 & 0.3708 & 18.95 \\
**ADrive** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0151 & 0.0050 & 0.045 & 0.3841 & 15.40 \\
**Mega** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0151 & 0.0034 & 0.045 & 0.3825 & 11.90 \\
**Google Drive** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0060 & 0.012 & 0.045 & 0.42 & 4.09 \\
**SafeCopy** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0034 & 0.0034 & 0.005 & 0.3688 & 8.00 \\
**OneDrive** & 0.018 & 0.056 & 0.057 & 0.109 & 0.079 & 0.0034 & 0.012 & 0.045 & 0.3794 & 3.49 \\
**AmazonDrive** & 0.018 & 0.005 & 0.057 & 0.109 & 0.079 & 0.0034 & 0.010 & 0.005 & 0.2864 & 3.00 \\
**Atlantic** & 0.018 & 0.005 & 0.057 & 0.109 & 0.079 & 0 & 0 & 0.005 & 0.273 & 9.00 \\
**IBM** & 0.018 & 0.056 & 0.057 & 0.147 & 0.079 & 0.0034 & 0.0034 & 0.045 & 0.4088 & 15.40 \\ \hline \hline \end{tabular}
\end{table}
Table 27: Cost–Benefit Analysis of Cloud Vendors.  
Figure 21: Cost–Benefit Analysis of Cloud Vendors.