Analytical procedures : Several analytical procedures are useful for detecting misclassified additions, unrecorded retirements and miscalculation of depreciation expense. The auditor compares property, plant and equipment balances and depreciation expense with amounts of previous years and budgets, and current additions to the capital budget. Also, the auditor computes the ratio of depreciation expense and accumulated depreciation to equipment balances in the current and previous periods. The auditor also relates changes in property, plant and equipment balances to expected related changes in insurance expense, land taxes and repairs and maintenance expense