Implementation of Lean Manufacturing with Waste Assessment Model (WAM) Approach in A Small Muffler Industry in Purbalingga

Abstract

Small to medium-sized industry (SMEs) is one of the sectors that supports the Indonesian economy, for example in Purbalingga Regency there is MMS K477INE. MMS K477INE is an SME that produces various types of muffler or muffler of a motorbike and it has entered the global market, one of them is a 2 stroke muffler type RX King Telo Kobra. In the muffler production process, it must be done better to fulfill customer demand and satisfaction. However, from the implementation of activities on the production floor, there are several problems so it cannot be denied that the SME there is a waste. Therefore, in this case, it is necessary to apply a lean manufacturing approach to solve the problem using the Waste Assessment Model (WAM). WAM consists of Seven Waste Relationship, Waste Relationship Matrix, and Waste Assessment Questionnaires, which data collection is done through filling out questionnaires and direct observation. The WAM approach is used to find the problem of waste and is supported by the root causes of waste by using Root Cause Analysis. The next stage is to create a recommendation improvement, based on the problems that occur in the highest value waste is motion waste with a value of 26.7%, defect with a value of 18.5%, and transportation with a value of 14%. So that the recommendation improvement that has been created can reduce the value of waste