Nortel Networks Option 11C NFT values

Sparesplanning Page193 of 544
Option11C and 11C Mini TechnicalReference Guide
NFT values
Table59 translates NFT values to the number of spares required in stock:
N—Number in use
F—Failure rate
T—Turnaround time (in hours)
Table 5 9
Number of spares required (Part1 of 2)
NFT values Number
of spares
00.0010 1
0.0010 0.0452 2
0.0452 0.1890 3
0.189 0.425 4
0.425 0.734 5
0.734 1.090 6
1.09 1.50 7
1.50 1.95 8
1.95 2.43 9
2.43 2.94 10
2.94 3.46 11
3.46 4.01 12
4.01 4.58 13
4.58 5.16 14
5.16 5.76 15
5.76 6.37 16