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INVENTORIES | 9 Months Ended
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Jul. 30, 2022
Inventory Disclosure [Abstract] |
INVENTORIES | INVENTORIES As of the dates indicated, inventories are comprised of the following (in thousands):
| July 30, 2022 |  | October 30, 2021
Raw materials | $ | 621,849 |  |  | $ | 175,399 |
Work-in-process | 19,462 |  |  | 10,260 |
Finished goods | 187,008 |  |  | 180,800 |
Deferred cost of goods sold | 33,800 |  |  | 44,765 |
Gross inventories | 862,119 |  |  | 411,224 |
Reserve for inventory excess and obsolescence | (35,446) |  |  | (36,959) |
Inventories, net | $ | 826,673 |  |  | $ | 374,265 |
Ciena has been expanding its manufacturing capacity and accumulating raw materials inventory of components that are available, in some cases with expanded lead times, in an effort to prepare Ciena to produce finished goods more quickly when supply constraints ease for certain common components, including integrated circuit components, for which delivery continues to be delayed. The increase in raw materials inventory is related to these steps to mitigate the impact of current supply chain constraints and the global market shortage of semiconductor parts. Ciena writes down its inventory for estimated obsolescence or unmarketable inventory by an amount equal to the difference between the cost of inventory and the estimated net realizable value based on assumptions about future demand, which are affected by changes in Ciena’s strategic direction, discontinuance of a product or introduction of newer versions of products, declines in the sales of or forecasted demand for certain products, and general market conditions. During the first nine months of fiscal 2022, Ciena recorded a provision for inventory excess and obsolescence of $12.0 million, primarily related to a decrease in the forecasted demand for certain Networking Platforms products. Deductions from the provision for excess and obsolete inventory relate primarily to the sale of previously reserved items and disposal activities.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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