This book constitutes the refereed proceedings of the Third Workshop on Engineering Applications, WEA 2016, held in Bogota, Colombia, in September 2016.

The 35 revised full papers presented were carefully reviewed and selected from 128 submissions. The papers are organized in topical sections on computer science; computational intelligence; simulation systems; fuzzy sets and systems; power systems; miscellaneous applications.

This book constitutes the refereed proceedings of the Forth Workshop onEngineering Applications, WEA 2017, held in Cartagena, Colombia, inSeptember 2017. The 59 revised full papers presented were carefully reviewed and selectedfrom156 submissions. The papers are organized in topical sections such as computerscience; computational intelligence; simulation systems; internet of things; fuzzy sets and systems; power systems; logistics and operations management; miscellaneous applications.