Objective Function

The objective beneath planning problem is to find out the optimal disassembly sequence that maximizes the net profit achieved from disassembly operations and is mathematically shown as:

The cause is to maximize the net profit shown by objective function value Z_p.

RC_psai  is the composite recovered value of part/subassembly psa_i,DC_psai  is the  disposal cost of part/subassembly psa_i′,BC_psai   is the breaking cost of joint/subassembly sol_j and  is the setup cost incurred if the joint/subassembly sol_k is broken immediately before sol_k+1.W_{solK ,Sol K+1}

The first term of the objective function indicates the composite recovered value of each part/sub-assembly constitutes and recovered the only positive contribution to the profit Z_p. The second term shows the price for disposal of un-recoverable or un-economical parts. The third term consequents to the costs occupied in breaking of joints and sub-assemblies while the final term shows the setup costs incurred because of sequence whether the joints have to be broken. Final three terms decrease the whole profit attained during the disassembly operation and thus is subtracted from the objective function value.

                                                                             Table no.5: Inputs and Output for FLC

                                       Table no.6: Conclusion Obtained for Optimal Disassembly of Head Held Electric Drill