Index group

Use this field to specify the index group the index method belongs to. You can select the relevant index group from a pick list. This pick list contains the index groups defined in Supporting data > Index groups.

Period

Use this field to specify how often you wish to index, for example yearly or quarterly.

Is based on year index

Use this field to specify whether you want to use the year index number as a numerator.

Relative year for numerator

Use this field if you want to use the index number of a relative year as a numerator. The relative year number indicates the number of years that has to be subtracted from the actual year in the indexation process.
Example: if the indexation date is 1/1/2007 and the value specified in this field is -2, the index number of January 2005 will be used as numerator.

Relative month for numerator

Use this field if you want to use the index number of a relative month as a numerator. The relative month number indicates the number of months that has to be subtracted from the actual month in the indexation process.

Fixed month for numerator

When you index contract prices according to an indexation method based on both an index group and a base amount, the new price will be calculated as follows:

If you want to use the index number of a fixed month as a numerator, you can use the Fixed month for numerator field to specify a fixed month. The index number of this month will then be used as numerator.