Use of Estimates :

The measurement procedures to be followed in an interim financial report should be designed to ensure that the resulting information is reliable and that all material financial information that is relevant to an understanding of the financial position or performance of the enterprise is appropriately disclosed. While measurements in both annual and interim financial reports are often based on reasonable estimates, the preparation of interim financial reports generally will require a greater use of estimation methods than annual financial reports

Illustration 4 attached to the Standard illustrates the use of estimates in interim periods.