Inventories (Tables)

12 Months Ended

Oct. 31, 2020

Inventory Disclosure [Abstract]

Inventories

As of the dates indicated, inventories are comprised of the following (in thousands):

	October 31, 2020		November 2, 2019
Raw materials	$	119,481	$	99,041
Work-in-process	13,738		13,657
Finished goods	210,050		226,622
Deferred cost of goods sold	40,747		53,051
	384,016		392,371
Reserve for excess and obsolescence	(39,637)		(47,322)
	$	344,379	$	345,049

Activity in reserve for excess and obsolete inventory

The following table summarizes the activity in Ciena’s reserve for excess and obsolete inventory for the fiscal years indicated (in thousands):

Year Ended	Beginning Balance		Provisions		Disposals		Ending Balance
November 3, 2018	$	51,206	$	30,615	$	30,883	$	50,938
November 2, 2019	$	50,938	$	28,085	$	31,701	$	47,322
October 31, 2020	$	47,322	$	24,701	$	32,386	$	39,637