INVENTORIES (Tables)

12 Months Ended

Oct. 29, 2022

Inventory Disclosure [Abstract]

Inventories

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

	October 29, 2022		October 30, 2021
Raw materials	$	664,916	$	175,399
Work-in-process	18,232		10,260
Finished goods	258,584		180,800
Deferred cost of goods sold	41,084		44,765
Gross inventories	982,816		411,224
Reserve for excess and obsolescence	(36,086)		(36,959)
Inventories, net	$	946,730	$	374,265

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
October 31, 2020	$	47,322	$	24,701	$	32,386	$	39,637
October 30, 2021	$	39,637	$	17,850	$	20,528	$	36,959
October 29, 2022	$	36,959	$	16,184	$	17,057	$	36,086