Bravida is one of Scandinavia's leading suppliers of technical installations and services. According to Bravida an installer loses around 35 per cent of their daily work. It’s the time aspect that’s going to be examined in this thesis. The purpose of this thesis is that the student in question is to investigate the activities of the installers that works with this project, identifying where and how time losses occur and come up with suggestions for improvement. Methods used in this work is literature studies, observational studies and interviews. When it comes to the theory, the student in question chose to focus on Lean production, communication and utilities like 5S, because the student believes that it covers the areas that’s going to be explored. Lean production has been used for a long time in many different industries to reduce waste and make the process work more effective. The construction industry has pioneered the use of Lean production lately. Given that the construction industry is based on relationships between participants results in making communications a big part of the constructionprojects. The conclusion of this thesis was that problems always occur in projects, both the leading installer and installers run into problems in projects. The underlying causes of the problems is poor communication, problems with drawings and lack of information about the projects. These solutions were developed to eliminate these problems. Communication problems can be improved by making the leading installer a part of the planning phase, also making sure that the information at the “coordination meetings” is clear and understandable in a way that makes it possible for the leading installers to easily solve the problems.