This two-volume set (CCIS 915 and CCIS 916) constitutes  the refereed proceedings of the 5th Workshop on Engineering Applications, WEA 2018, held in Medellín, Colombia, in October 2018.
The 50 revised full papers presented in this volume were carefully reviewed and selected from126 submissions. The papers are organized in topical sections such as computer science; computational intelligence; simulation systems; software engineering; power and energy applications.