| Refer ence | DL/ML/ANN | Meta-heuristic algorithm | Dataset | Evaluation parameter | Contributions |
| [42] | NN | Fiery algorithm, BAT algorithm | COCOMO81, NASA, MAXWELL, China | MRE, MMRE, pred, MDMRE | Hybrid model for effort estimation | [45] | ANN | Firefly | COCOMO81, NASA, MAXWELL, China | MMRE, MdMRE, PRED | Hybrid model for cost estimation | [46] | DNN | Cuckoo, hybrid PSO | COCOMO | RE, MRE, MMRE, MARE, PRED, execution time | Hybrid model for cost estimation | [11] | DNN | GA | KC1, KC2, CM1, PC1, JM1 | Accuracy, precision, F-score, recall, sensitivity | Defect prediction | [47] | DL | Evolutionary algorithm | KEEL dataset repository | Accuracy, G-mean, precision, F-score, computational time | Hybrid of DBN and ADE for imbalanced classification | [48] | NN | GA, PSO | N/A | Survey | Possibility to apply on DL | [49] | NN | Cuckoo | COCOMO | MMRE, standard deviation | Improve cocomo | [50] | ANN | Cuckoo | COCOMO81, NASA | MMRE, PRED, computational time | Hybrid model | [51] | GWO, HSA | SBA | NASA | MRE, MMRE | Hybrid model |
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