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Table 6 The factor level of parameters

From: Multi-objective flexible job-shop scheduling problem using modified discrete particle swarm optimization

Parameters

Value range

Factor level

1

2

3

4

N

50–200

50

100

150

200

ω

0.90–0.98

0.9

0.94

0.96

0.98

(c 1, c 2)

0.2–0.8

(0.2, 0.8)

(0.4, 0.6)

(0.6, 0.4)

(0.8, 0.2)

c 3

0.001

0.001

0.01

0.05

0.1

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