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INVENTORIES (Tables) | 12 Months Ended
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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 |

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