Steelform Scandinavia AB is a company that manufactures fittings for reversible windows. This study has examined the stops that occur at a robot line which accounts for a large part of the company’s assembly. The company’s previous values of the robot lines overall equipment efficiency, OEE, has varied between 45-75%. Today, OEE calculations are no longer made due to the company having problems seeing the reliable ones as it is difficult to get a clear picture of availability.

The purpose of this study is to identify which stops that occur at the robot line, how much impact the downtime has on the OEE value and how the stops can be remedied.

In order to achieve the purpose of the study, the following questions has been formulated:

[1] Which overall equipment efficiency, OEE, has the robot line?

[2] What type of stops occurs at the robot line?

[3] How can the stop downtimes be remedied and thereby increase the overall equipment efficiency by the robot line?

The result of the observations that has been done shows that it is a big amount of stops that occur at the robot line that contributes to a high downtime. This downtime also contributes to the low OEE value that the study estimates that the robot line currently has. If the downtime is divided into necessary and other unplanned stops shows that 62% of the total downtime is time that goes to the other unplanned stops, thus stops that do not have to arise if the reasons for these are remedied. If this time instead can be converted into production time the efficiency and capacity of the robot line will increase. In this study this gives an increase of the OEE value with 13,7%.

Proposed actions that are given is that the company should get a better knowledge about OEE and what its values means. Also, be able to use this to know where improvements are needed. The most frequent stops are explained and the reasons why these stops occur turns out to be based on several different things. A number of factors are important for the robot line's function. On the one hand, knowledge and awareness among both operators and management. The way of working in the current situation regarding routines and maintenance work as well as the working environment is also proving to be important.