Datakvalitet
En fallstudie om kvaliteten i SJ
SJ is a government-owned passenger train operator in Sweden. SJ currently uses asystem called Ford for control and monitoring of maintenance. Technical andorganizational factors have given Ford the character of a monolithic system withoutflexibility and conditions to meet SJ's increased requirements.The main purpose of this master's thesis is to investigate how data quality can bedefined at SJ and to examine the data quality in Ford. This will give SJ an indication ofwhat their quality efforts should focus on in the future.The technical data quality parameters found are: accuracy, timeliness, completenessand consistency. The user centred data quality parameters are: accessibility,understandability and reliability. These parameters have been used to betterunderstand and illustrate the user experience of the data quality in Ford and are usedto evaluate the current data quality.This master?s thesis has resulted in a conclusion that data in Ford, according to thetechnical parameters, is of good quality except for some specific problems. Eventhough the users experience the data quality as relatively low, this thesis concludesthat the main problems are related to the user centred and organizational aspectsrather than to data itself. The quality problems in Ford are due to lack of education,the way of working at SJ, the data base structure of Ford, the user interface and thelack of functionalities in Ford.