Delta Report

Delta Report compares two points in time and tells you what changed in between. VMs, hosts, vCPUs, memory, and disk, expressed as absolute change and as a percentage, with the effect on build capacity alongside. It is the screen that turns did that project work into a number.

What this screen shows

• Unit selection. Run the comparison across data centers, vCenters, clusters, or VMs, depending on the granularity of the question.
• Summary deltas. Change in VMs, hosts, vCPUs, memory, and disk allocated over the window.
• Table. Growth columns with percentage changes, plus the build capacity impact of everything that moved.

Build capacity impact is the column that distinguishes this from a straightforward inventory diff. Adding forty VMs matters differently depending on whether the environment absorbed it comfortably or spent its remaining headroom doing so.

When to use it

• Auditing a period. Month over month or quarter over quarter, for governance or for a review deck.
• Proving an initiative worked. Migrations, consolidations, and right-sizing programs all need an after number, and this is it.
• Catching unexpected movement. Growth nobody requested, or shrinkage nobody explained, both surface here.

How to work it

• Bracket the change window. Set start and end dates just outside the change itself to isolate its impact from ordinary drift.
• Group by constraint or environment. That shows where growth concentrated, which is usually more actionable than the estate-wide total.

Tip: Run this after a right-sizing batch. Allocations should fall while VM count holds steady. If VM count moved too, something other than your change is in the numbers and the result is not clean.

Related screens

Virtual Trends shows the whole curve where this shows two points on it. VM Right-Sizing generates the changes this report verifies. Storage Delta Report is the equivalent for the array estate.