Matisha Parekh
Dr. V. S. Deshpande
Abstract
In the generation of agile manufacturing, the machines and its functions are also becoming complex. OEE of a machine plays an important role in present scenario where delivery and quality are of prime importance to customer. The aim is to illustrate the use of FMEA analysis by discussing a novel case study dedicated to the improvement of Overall Equipment Effectiveness. One of the most widely used performance measures is OEE, a powerful tool for production development if used correctly. It is a three-part analysis tool for equipment performance based on its availability, performance, and the quality rate of the output. It is used to identify for equipment the related losses for the purpose of improving total asset performance and reliability. Failure Modes and Effects Analysis (FMEA) and Failure Modes, Effects and Criticality Analysis (FMECA) are methodologies designed to identify potential failure modes for a product or process before the problems occur, to assess the risk. In the agro based industry a data of downtime of all the machines was collected from November 2012 and it was observed that the highest downtime was in the component 2 and the grinder machine. Hence these machines are selected for the performance measurement through OEE. After calculating the three parameters that is performance, availability and quality, the OEE of component 2 and hammer mill was observed to be 71.70% and 72.60% respectively. Followed by OEE, FMEA analysis was conducted to identify the critical machinery. The risk priority number for each sub equipment was calculated. The RPN number of equipment 1 of the component 2 reduced from 280 to 160 and that of hammer mill reduced from 256 to 180. This improved the availability of the machinery and further suggestions were provided to improve the overall equipment effectiveness of the plant.
Keywords- Overall Equipment Effectiveness, Performance, Failure mode and Effect Analysis, Agro based plant.