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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Oct. 28, 2018
Accounting Policies [Abstract]  
Rollforward of uncollectible accounts
The following table represents the rollforward of our uncollectible accounts for the fiscal years ended October 28, 2018, October 29, 2017 and October 30, 2016 (in thousands):
 
October 28,
2018
 
October 29,
2017
 
October 30,
2016
Beginning balance
$
8,325

 
$
7,413

 
$
7,695

Provision for bad debts
(491
)
 
1,948

 
1,343

Amounts charged against allowance for bad debts, net of recoveries
(1,585
)
 
(1,036
)
 
(1,625
)
Ending balance
$
6,249

 
$
8,325

 
$
7,413
Components of inventory
The components of inventory are as follows (in thousands):
 
October 28,
2018
 
October 29,
2017
Raw materials
$
205,902

 
$
150,919

Work in process and finished goods
48,629

 
47,377

 
$
254,531

 
$
198,296
Rollforward of reserve for obsolete materials and supplies
The following table represents the rollforward of reserve for obsolete materials and supplies activity for the fiscal years ended October 28, 2018, October 29, 2017 and October 30, 2016 (in thousands):
 
October 28,
2018
 
October 29,
2017
 
October 30,
2016
Beginning balance
$
5,205

 
$
3,984

 
$
3,749

Provisions
3,069

 
1,923

 
1,463

Dispositions
(1,655
)
 
(702
)
 
(1,228
)
Ending balance
$
6,619

 
$
5,205

 
$
3,984
Property, plant and equipment
Property, plant and equipment consists of the following (in thousands):
 
October 28,
2018
 
October 29,
2017
Land
$
17,398

 
$
18,473

Buildings and improvements
172,920

 
178,019

Machinery, equipment and furniture
356,509

 
336,163

Transportation equipment
4,287

 
4,599

Computer software and equipment
116,449

 
117,515

Construction in progress
28,608

 
15,092

 
696,171

 
669,861

Less: accumulated depreciation
(459,931
)
 
(442,866
)
 
$
236,240

 
$
226,995
Estimated useful lives for depreciation
Estimated useful lives for depreciation are:
Buildings and improvements
15
–
39 years
Machinery, equipment and furniture
3
–
15 years
Transportation equipment
4
–
10 years
Computer software and equipment
3
–
7 years