Product Warranty

12 Months Ended

Mar. 31, 2012

Product Warranty

15. Product Warranty

The following is a reconciliation of the changes in the aggregate product warranty accrual for 2012, 2011 and 2010:

(In thousands)	2012			2011			2010
Product warranty accrual, beginning	$	4,415		$	2,576		$	2,057
Warranty charges incurred, net		(7,200	)		(6,818	)		(4,040	)
Provision for warranty charges		6,972			8,657			4,559
Product warranty accrual, ending	$	4,187		$	4,415		$	2,576

Net warranty charges incurred include labor charges and costs of replacement parts for system repairs under warranty. These costs are recorded net of any estimated cost recoveries resulting from either successful repair of damaged parts or from warranties offered by the Company’s suppliers for defective components. The provision for warranty charges reflects the estimate of future anticipated net warranty costs to be incurred for all products under warranty at fiscal year end and is recorded to cost of sales.