---
title: "Cumulative Descending"
canonical: "https://modelassist.epixanalytics.com/space/EA/26575223/Cumulative%20Descending"
format: markdown
---
No Crystal Ball distribution, but as illustrated below it can be constructed with [Crystal Ball's Custom distribution](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575279/)

 

This is another form of the [cumulative ascending](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575222/) distribution but here the list of cumulative probabilities represents the probabilities of being greater than or equal to their corresponding x-values.

 

An example of the Cumulative descending distribution is given below:

 

 

Example of a Cumulative Descending distribution,

using data ({0,1,4,6,10},{1.0,0.8,0.6,0.1,0})

![image](media://f2b5bc60-bce6-4803-81c2-f08c6e81ce53)

 

 

#### Uses

See [Cumulative Ascending distribution](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575222/)

 

### Generation

The Cumulative descending distribution is not directly available in Crystal Ball. However, if you have data that is in a cumulative descending form, you can easily convert it, so that you can use the [Cumulative Ascending distribution](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575222/) that you can construct using [Crystal Ball's Custom distribution](https://epixanalytics.atlassian.net/wiki/spaces/EA/pages/26575279/), as is shown in the figure below.

 

The data used in Crystal Ball's Custom Cumulative ascending distribution below is "C10:D16".

 

![image](media://45714ee2-4e04-45bf-878a-b156f98e5d30)

 

The resultant Cumulative Ascending distribution will look like this:

 

![image](media://a80e6252-fec2-43aa-b23c-4850634421ed)

 

 

 

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