The things that can be done to validate that the design meets target SLAs and reduces the headcount required to manage the solution are:
* Use tagging and scripts to auto-generate backup jobs, set the start time and windows, letting the backup server manage resource allocation. This option allows to automate the backup job creation and configuration, based on the tags assigned to the source objects, such as VMs, hosts, or clusters1. This reduces the manual effort and human error involved in managing the backup jobs, and ensures that the backup server allocates the optimal resources for each job, based on the load balancing and performance settings2.
* Explain how to detect configuration changes, reporting and using backup job templates to maintain consistency. Document self-service restore the streamline service desk engagement. This option allows to monitor the backup infrastructure and detect any changes that may affect the backup performance or reliability, such as adding or removing VMs, hosts, or clusters3. It also allows to use backup job templates to create consistent and standardized backup policies, and apply them to multiple backup jobs4. Additionally, it allows to document the self-service restore process, which enables end-users to perform file-level restores from their own backups, without involving the backup administrator or the service desk5.
* Review the design so that the slowest part of the infrastructure is fast enough to meet backup window requirements. This option allows to identify and optimize the bottleneck in the backup infrastructure, which is the component that limits the backup speed and throughput. By reviewing the design and ensuring that the slowest part of the infrastructure can meet the backup window requirements, the backup SLAs can be achieved and the backup performance can be improved.
The other options are either not relevant for validating the design (option A and E, as exporting the configuration, scheduling a review, and reviewing the design for bottlenecks are part of the design process, not the validation process) or not effective for meeting the SLAs and reducing the headcount (option C, as using inventory information, backup chaining, and fine tuning are manual and complex tasks that may not guarantee the backup window compliance or resource efficiency). References: Tagging, Load Balancing and Performance, Configuration Change Tracking, Backup Job Templates, Self-Service File Restore, [Bottleneck Statistics]