5S assessment using rasch measurement model: a case study in advanced manufacturing industry

5S practices a common practice in the company and purposely to develop awareness among the team member and build responsibility of normal and abnormal conditions in their workplace area (Brophy, 201 3). The 5S element are Sort, Set in Order, Shine, Standardize and Sustain. The study is only focus on 5S practices because in the Laying Up process, most of the activities are manually conducted which means the performance and quality of works depends on the operators' skills. The study was composed with two main objectives which are; firstly is to assess the current 5S practices in term of understanding, knowledge and actual practices in Lay Up process area using questionnaire-based survey and observation methods and analysed in Rasch Measurement Model (RMM) and secondly is to recommend the improvement strategies to improve the 5S practices based on analysis results of Rasch Measurement Model (RMM). In evaluating the current state 5S practices, the quantitative method which is survey had been created. Before the real survey had been launched, the pilot survey had been distributed to test the reliability of person and items and also act as trial to make better questionnaire's structure for real survey. Then, the realsurvey had created to analyse their knowledge, understanding and practices of every elements of 5S practices; sort, set in order, shine, standardize and sustain. The analysis showed that, most of the respondents have good knowledge, understanding and practice these 5S elements in their routine works. Next to analyse either these respondents applied or practiced the 5S practices in their work activities, observation based analysis had been done. From the observation based analysis made, it had proved that what are the respondents answered is parallel to what are they doing in their routine works. Lastly, some improvement strategies are also suggested such as training, publish the RWP (Residence Work Plan), complimentary and punishment and Deming's PDCA (Plan-Do-Control-Act).