Management judgements and estimates

In preparing the semi-annual financial statements, management makes estimates and assessments which affect the assets and liabilities presented as of the balance sheet date and the result for the first half of the financial year.

The influence of judgements and estimates is significant for the measurement of fixed assets, customer contracts, trade receivables, the provision for abandonment costs and redevelopment, deferred taxation, pensions and other equity interests, and for the classification of equity interests in the context of IFRS 10 Consolidated Financial Statements and IFRS 11 Joint Arrangements.