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Summary of significant accounting policies (Tables)

12 Months Ended

Mar. 31, 2018

Depreciation and amortization is computed using the straight-line method over the estimated useful lives of the assets, which are as follows:


Asset description	Asset life (in years)
Buildings		20
Computers and software		3-4
Furniture, fixtures and office equipment		2-5
Vehicles		3
Leasehold improvements		Lesser of estimated useful life or lease term

The Company’s definite lived intangible assets are amortized over the estimated useful life of the assets on a straight-line basis, as given below.


Asset description	Weighted average amortization period (in months)
Customer contracts		48
Customer relationships		217
Covenant not-to-compete		48
Trade names		34
Technology		94
Intellectual Property and other rights		24
Software		55
Service mark		Indefinite useful life