Optimization techniques are adopted, for example, in scheduling, planning (airports, production), tuning, allocation (HPC), resource optimization (energy), routing (communication), synthesis (decision support, auto-design, machine learning), search (big-data, auto-design), reliability (sensor fusion, configuration), classification (security, pattern recognition), etc. The companies which develop such systems generally market families of products. Software engineering aspects such as reducing complexity, enhancing reusability, adaptability, reliability, performance, etc. can be considered essential if economic development and maintenance of such systems have to be assured. Relatively much less attention has been paid by the SE community to consider SE aspects of software systems with embedded optimization techniques. This workshop aims at specifying, assessing and improving software engineering (SE) aspects of software systems which incorporate optimization techniques.