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Inventories (Tables) | 12 Months Ended
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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 |

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