**7. Limitations and Future Works**

According to the previous research on this subject, it is essential to consider that other variables may have a profound impact on the prediction process of pile setup, such as coefficient of consolidation, or over consolidation ratio, which have not been considered in this study due to the lack of appropriate data sets. In addition, to make these types of studies more informative for civil engineers, previous empirical equations or developed theories in the area of pile capacity can be considered and used in the portion of data preparation. In this way, a civil engineer or a geotechnical engineer has enough knowledge regarding data preparation. A combination of these theories together with AI models makes these types of studies different and more applicable than an application of AI methodologies. The proposed techniques in both the prediction and optimization phases of this study were constructed based on the entire database described in Section 3 and are valid in the range of this database. The results may be different if out-of-range inputs are used.
