About Achieved Savings
The Achieved Savings section shows the monthly cost reductions you've already realized. It provides insights into where and how these savings were made, broken down by service, account, and region.
Achieved Savings Calculation- How it Works
When you resolve a ticket in OneLens, it doesn’t just close immediately. Instead, the ticket moves into a Pending Verification stage. During this time, OneLens watches the resource linked to that ticket to check if the recommended action was actually carried out.
This verification period lasts for 5 days right after you mark the ticket as resolved.
What Happens During These 5 Days?
OneLens continuously monitors the resource to detect specific types of changes that prove the recommended action was implemented. These changes include:
Pricing Variance: Switching pricing models or instance types, such as moving from On-Demand to Reserved.
Provisioned Capacity Change: Rightsizing or scaling down resources.
Resource Deletion: Completely removing the resource.
Resource Stop: Temporarily shutting down a running resource.
Resource Upgradation: Detected when the previous usage type disappears, indicating a replacement or scale-up.
Once a qualifying change is detected, OneLens identifies the Date of Change (DOC) — the exact day the change first occurred. To confirm the change is stable and not a short-term fluctuation, it reviews usage data with a 3-day buffer before and after the DOC.
Then, OneLens calculates savings by comparing the resource’s cost over two periods:
Pre-Change Cost: The average daily cost over the 7 days before the DOC.
Post-Change Cost: The average daily cost over the 3 days following the DOC.
If no relevant change is found within the 5-day window, the ticket is automatically marked as Auto Resolved with zero achieved savings recorded.
How Savings Are Calculated
Once the change is confirmed, OneLens calculates the achieved savings by comparing costs before and after the change:
Pre-Change Cost: It averages the daily cost of the resource over the 7 days before the DOC.
Post-Change Cost: It averages the daily cost over the 3 days following the DOC.
Daily Savings: Subtract the post-change daily cost from the pre-change daily cost.
Monthly Savings: Multiply the daily savings by 30 to estimate monthly achieved savings.
Keep in mind, this is an estimate and actual monthly savings may vary due to fluctuations in usage patterns, pricing changes, or other factors.
What Happens When Multiple Tickets Are Resolved by One Change?
Achieved savings are calculated at the resource level. This means OneLens measures the total savings from a single resource, regardless of how many tickets or policies were involved.
If one change addresses multiple tickets linked to the same resource, the savings from that change are combined into a single achieved savings value for that resource—avoiding double counting.
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