You can set the time scale for either your entire model in **Time** **Year**, you can create a line item that has a time scale of **Month**.

To apply a different time scale to an individual line item:

- Select
**Modules**in the model settings bar. - Select the module that contains the line item you want to edit, then select
**Open**. - Select
**Blueprint**. - Select an option for your chosen line item in the
**Time Scale**column.

When you change the time scale for a line item, a subsidiary view is automatically created.

## Formula example

If two line items have a different time scale, and one refers to the other in a formula:

- Days sum into months.
- Months sum into quarters.
- Quarters sum into years.

If required, you can skip different time levels. For example, days can sum into years.

If line item `X`

has a time scale of **Months**, and line item `Y`

has a time scale of **Years**, then `Y=X`

returns the year total. However, `X=Y`

returns a blank value, as `Y`

contains no corresponding value for each month (`X`

).

You can create formulas with the following functions to return a result:

In the table below, the `X`

and `Y`

line items have the same time scales as above.

Example formulas | Explanation |

`Y=X` | The formula returns the relevant time total from `X` , where `X` has a more detailed timescale than `Y` . |

`X=Y` | The formula returns a blank result, unless the Summary method is set to Formula, in which case it will show the value `Y` in the year totals only. |

`X=YEARVALUE(Y)` | The formula returns the value of `Y` in each month. |

`X=YEARVALUE(Y)/12` | The formula evenly allocates the value of `Y` over months. |

`X=YEARVALUE(Y) * Seasonality %` | The formula allocates `Y` according to a seasonality percentage. |

`X=Y[SELECT:Time.FY11]` | The formula returns the value of `Y` for a specific year. |