In the competitive environment of today, availability and reliability of assets is more than ever an important issue. Maintainers are faced with the challenge to deliver the same levels of equipment safety, reliability and availability with smaller budgets. Therefore, maintenance & reliability best practices are critical for every organization who would like to be best in class. Apart from maintenance & reliability engineering, outsourcing maintenance activities to contractors could contribute to this significantly. Because sometimes external parties are better suited to improve the performance than you or you simply do not want to do it yourself.