| 18) | Property, plant and equipment, net |
Property, plant and equipment are measured at cost, including directly attributable costs, less accumulated depreciation, accumulated impairment losses and any related investment grants and excluding day-to-day servicing expenses. Cost includes spare parts and auxiliary equipment that are used in connection with plant and equipment. The cost of an item of property, plant and equipment comprises the initial estimate of the costs of dismantling and removing the item and restoring the site on which the item is located.
Depreciation is calculated on a straight-line basis over the useful life of the assets at annual rates as follows:
| % | |||
| Computers, software and peripheral equipment | 7-33 (mainly 33%) | ||
| Office furniture and equipment | 6-33 | ||
| Motor vehicles | 15 | ||
| Buildings | 2-4 |
Leasehold improvements are amortized using the straight-line method over the term of the lease (including option terms that are deemed to be reasonably assured) or the estimated useful life of the improvements, whichever is shorter.
The useful life, depreciation method and residual value of an asset are reviewed at least each year-end (at the end of the year) and any changes are accounted for prospectively as a change in accounting estimate. Depreciation of an asset ceases at the earlier of the date that the asset is classified as held for sale and the date that the asset is derecognized. For impairment testing of property, plant and equipment, see Note 2(21) below.