Other Balance Sheet Information

6 Months Ended

Mar. 31, 2012

Other Balance Sheet Information

12. Other Balance Sheet Information

Components of other selected captions in the Consolidated Balance Sheets are as follows (in thousands):

	March 31, 2012		September 30, 2011
Accounts receivable	$	81,175	$	77,318
Less allowances		683		617
	$	80,492	$	76,701
Inventories, net
Raw materials and purchased parts	$	68,865	$	65,770
Work-in-process		23,539		29,460
Finished goods		12,661		12,424
	$	105,065	$	107,654

The Company provides for the estimated cost of product warranties, primarily from historical information, at the time product revenue is recognized and retrofit accruals at the time retrofit programs are established. The Company’s warranty obligation is affected by product failure rates, utilization levels, material usage, service delivery costs incurred in correcting a product failure, and supplier warranties on parts delivered to the Company. Product warranty and retrofit activity on a gross basis for the three and six months ended March 31, 2012 and 2011 is as follows (in thousands):

Activity — Three Months Ended March 31, 2012

Balance December 31, 2011	Accruals	Settlements	Balance March 31, 2012
$7,293	$3,405	$(3,417)	$7,281

Activity — Three Months Ended March 31, 2011

Balance December 31, 2010	Accruals	Settlements	Balance March 31, 2011
$7,882	$2,412	$(2,627)	$7,667

Activity — Six Months Ended March 31, 2012

Balance September 30, 2011	Adjustments for acquisitions and  divestitures	Accruals	Settlements	Balance March 31, 2012
$7,438	$7	$6,923	$(7,087)	$7,281

Activity — Six Months Ended March 31, 2011

Balance September 30, 2010	Accruals	Settlements	Balance March 31, 2011
$8,195	$4,921	$(5,449)	$7,667