# Shifting Assumptions
URL: https://docs.valsight.ai/shifting-assumptions/
Description: Simulate the effect of revenue & cost streams as well as cash inflows & outflows delay or advancement through shifting an Assumption or its part. The shift d…
Simulate the effect of revenue & cost streams as well as cash inflows & outflows **delay or advancement** through shifting an **Assumption** or its part. The shift duration is always declared at monthly basis. Positive values represent delays and negative advancements. If the data is defined on yearly basis, the shift moves a portion of the values across the years (e.g. 6 month shift of yearly revenue will move 50% of year x to year x+1 and so on).

![shifting assumption eng v2.18.png](./images/5094190884.png)

There are 2 Tickboxes:

* The *"Create new version"* option duplicates the Assumption instead of rewriting it
* *Use new Version in Scenarios* reassigns the new version to current Scenarios.

## How to shift assumptions inside the Scenario Manager

Open the Scenario Manager and select the *three dots* next to the Assumption you want to Shift. The option to *Shift* the Assumption will appear as shown in the picture below.

![image2023-5-31\_11-53-3.png](./images/5148409897.png)