The Variations can be a very powerful tool when utelised correctly. Once you've signed off on a Contract or your Client wants to make any changes outside of the original Scope of Works, you can create a Variation which will allow you create an entirely separate Charges list from the main Project without having to create an entirely new Project.
Variations can operate in both Positive and Negative states, so if your Client decides to remove some Charges from the Contract at a later date, you can create a Negative Variation after the fact without affection the original Project/Contract.
Pro Tip
The Charges table within Variations operates the same as the Projects Charges Page.
Variations operate independently from the main Project so each Variation has its own independent Measure Tool. The Variations Measure Tool operates the same where you can create BOQ's from scratch but also has the added feature to be able to Import Pages/BOQ's from the main Project and make any required adjustments without affecting the original Project. Each Variation also operates independently of each other so you can tick a Variation as Won or Lost without it affecting any other Variation that you've created.
And that is a brief overview of Variations. They can be incredibly useful for creating any changes after the main Contract or Works that has been signed off/completed.