May 21 st - 23rd 2014 , Brno, Czech Republic, EU IMPROVE PRODUCTIVITY WITH A MULTI-STAGE PRODUCTION OF TRANSFORMER SHEETS Edward MICHLOWICZ AGH University of Science and Technology, Krakow, Poland, e-mail: michlowi@agh.edu.pl Abstract The development of the concept of the supply chain has resulted in a broader view of logistics. The primary goal of production logistics can be formulated as expansion of the capabilities for the implementation and reliability of deliveries with the lowest logistical and production costs. In such an approach production systems are those in which input quantities are temporally and spatially transformed into products. With logistical supply networks at the input and distribution networks at the output of the system, production and logistics are closely linked. The approach proposed within the framework of Lean enterprises is interesting. The methods appearing in the literature under the name Lean toolbox can be used to improve a company’s productivity indices. The article presents parts of research OEE performance indicator for many production lines. The object of the study was the production plant of transformer sheets. Keywords: productivity, efficiency indicator OEE, sheet production 1. INTRODUCTION The basic problems considered by industrial logistics are: displacement of materials and information, data storing and processing, problems of integrating the materials flow process, planning and control. The task of logistics is to ensure a buyer to obtain the proper quality and quantity of a product in due time and place on the minimal cost of delivery [4]. Continuous search of methods improving effects of carried out activity has been characteristic feature for enterprise management in recent years. Currently the following ways are recommended more and more often: lean approach and lean thinking as a countermeasure to eliminate wastage (muda) by creating value stream in an enterprise [5]. The essence of lean approach is transformation of wastage (muda) into a value, thus determination of value is the first step during lean approach implementation. Whereas, tools supporting the lean concept include: VSM (Value Stream Mapping, Five Pillars Method – 5S, Jidoka, Heijunka, TPM – Total Productive Maintenance). The purpose of the TPM is to strive after maintaining continuous work of devices and machines executing specific tasks, which at the same time shows improvement of their functioning effectiveness. Until recently, the TPM was used mainly in production and repair processes. The main goal of TPM [R] is the strive to ensure continuous operation of the equipment and machines performing specific tasks, which also means improving their operational efficiency. The method is based on the use of human resources to analyse the causes of wastage and losses (muda) arising in the process and requires a systemic solution to the problems that cause downtime of machinery and equipment [1]. The main objectives for the implementation of the TPM method are: reducing the number of equipment failures, accelerating repair times of a unit or line, elimination of micro-stoppages, reduction of losses. The OEE (Overall Equipment Effectiveness) index is the primary measure for the TPM implementation effects [3]. The OEE is either overall equipment effectiveness or general equipment efficiency (machines, devices). This index shows what percent value of theoretically obtainable efficiency is characteristic for an examined device or line. The TPM identifies 6 main losses (in three subgroups) [2]: - time losses (availability: losses due to failure, losses for exchanges of die and adjustments), - efficiency losses (performance: losses for dead time and micro-downtime, losses due to process speed