An assumption period is a defined timeframe to set time-dependent assumptions for forecasting. If during a forecast period you need to update these assumptions, you can create a new assumption period. From the start date of this new assumption period, your revised assumptions will take effect. When you create a new assumption period (see Adding assumption periods), the assumptions you made previously are assigned to the period before the start date of the new assumption period.

If a process administrator allocates an asset to a budget process, an assumption period is automatically created for the underlying property or properties. This allows the user to define different forecasting assumptions for the budget start forecast compared to the existing assumptions used in the process where the asset currently exists.

If maintenance costs for an asset are assumed to be $100,000 per year in 2025 with an annual index of 5%, and the asset is allocated to a budget process starting in 2026, the indexed maintenance cost becomes $105,000. If this budget is incorrect, the user can adjust it to $115,000, which then serves as the starting point for the forecast from 2026 onward.

For rentable units the following fields are time-dependent:

For the income and expenditure screens, the data fields related to the following events are time-dependent:

When editing a time-dependent data field, you might come across some icons that indicate the origin of the data. This is what they stand for: