Research Article

A Multiobjective Optimization Algorithm to Solve the Part Feeding Problem in Mixed-Model Assembly Lines

Table 8

Results from heuristic and CPLEX for the solved instances.

Sample NT SA-based heuristicCPLEX
NTAILPR-AIL (%)a CPU (s)NTAIL CPU (s)

111024350230.5150.0000.0892.476230.5150.0897200
23350220.573*0.3480.0802.548220.5750.0807200
20350200.413*0.2420.056*2.047200.4140.0577200

29524300230.5420.0000.0892.277230.5420.0897200
23300220.5880.0000.0762.264220.5880.0767200
19350190.4380.0000.0471.775190.4380.0477200

3752425018*1.255 0.1241.815191.1150.1467200
22250200.7760.0000.1041.744200.7760.1047200
17300170.4580.0000.0461.128170.4580.04634.937

46024150171.482−2.8450.1124.562171.4410.0847200
15200150.3980.0000.0580.748150.3980.0584.507
13250130.4150.0000.0530.562130.4150.0532.062

55022150161.515−5.7220.9212.147161.4330.0677200
16200160.4330.0000.0580.916160.4330.0584.084
11250110.4090.0000.0410.449110.4090.0411.928

6402310017*1.9860.1179.748181.1250.1017200
15150150.3850.0000.0590.557150.3850.0592.097
12200120.3750.0000.0540.429120.3750.0541.281

73019100120.983−0.6140.2200.509120.9770.22015.786
17100160.5150.0000.1070.470160.5150.10787.166
15100150.4060.0000.0720.498150.4060.0721.303

8202150131.2160.0000.0880.421131.2160.08827.511
1650131.1260.0000.0690.961131.1260.0695.943
11100110.3860.0000.0570.211110.3860.0570.633

910155081.3800.0000.1220.18581.3800.1222.019
1150100.6720.0000.1190.182100.6720.1190.783
85080.3430.0000.0560.10180.3430.0560.208

Case  12615100130.4840.0000.1690.121130.4840.1692.076
Case  22315100150.3390.0000.0770.108150.3390.0771.574

Percentage error (PR) of the heuristic algorithm from CPLEX for the average inventory level (AIL).