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SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS
 3 Months Ended
Jan. 27, 2024
Restructuring and Related Activities [Abstract]  
SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS SIGNIFICANT ASSET IMPAIRMENT AND RESTRUCTURING COSTS
Restructuring Costs

Ciena has undertaken a number of restructuring activities intended to reduce expense and to align its workforce and costs with market opportunities, product development, and business strategies. The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in accrued liabilities and other short-term obligations on the Condensed Consolidated Balance Sheets, for the three months ended January 27, 2024 (in thousands):
Workforce
reduction		Other restructuring activitiesTotal
Balance at October 28, 2023$1,913 $— $1,913 
Charges2,861 
(1)
2,110 
(2)
4,971 
Cash payments(4,058)(2,110)(6,168)
Balance at January 27, 2024$716 $— $716 
Current restructuring liabilities$716 $— $716 

(1) Reflects employee costs associated with workforce reductions during the three months ended January 27, 2024 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes.
(2) Primarily represents costs related to restructured real estate facilities and the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization.

The following table sets forth the restructuring activity and balance of the restructuring liability accounts, which are included in accrued liabilities and other short-term obligations on the Condensed Consolidated Balance Sheets for the three months ended January 28, 2023 (in thousands):
Workforce
reduction		Other restructuring activitiesTotal
Balance at October 29, 2022$1,215 $4,620 $5,835 
Charges704 
(1)
3,594 
(2)
4,298 
Cash payments(1,498)(8,214)(9,712)
Balance at January 28, 2023$421 $— $421 
Current restructuring liabilities$421 $— $421 
(1) Reflects employee costs associated with workforce reductions during the three months ended January 28, 2023 as part of a business optimization strategy to improve gross margin, constrain operating expense, and redesign certain business processes.
(2) Primarily represents the redesign of certain business processes associated with Ciena’s supply chain and distribution structure reorganization and costs related to restructured real estate facilities.