Reassembly classification selection method based on the Markov Chain

Abstract

Purpose As the last link of product remanufacturing, reassembly process is of great importance in increasing the utilization of remanufactured parts as well as decreasing the production cost for remanufacturing enterprises. It is a common problem that a large amount of remanufactured part/reused part which past the dimension standard have been scrapped, which have increased the production cost of remanufacturing enterprises to a large extent. With the aim to improve the utilization of remanufacturing parts with qualified quality attributes but exceed dimension, the purpose of this paper is to put forward a reassembly classification selection method based on the Markov Chain. Design/methodology/approach To begin with, a classification standard of reassembly parts is proposed. With the thinking of traditional ABC analysis, a classification management method of reassembly parts for remanufactured engine is proposed. Then, a homogeneous Markov Chain of reassembly process is built after grading the matching dimension of reassembly parts with different variety. And the reassembly parts selection model is constructed based on the Markov Chain. Besides, the reassembly classification selection model and its flow chart are proposed by combining the researches above. Finally, the assembly process of remanufactured crankshaft is adopted as a representative example for illustrating the feasibility and the effectiveness of the method proposed. Findings The reassembly classification selection method based on the Markov Chain is an effective method in improving the utilization of remanufacturing parts/reused parts. The average utilization of remanufactured crankcase has increased from 35.7 to 80.1 per cent and the average utilization of reused crankcase has increased from 4.2 to 14 per cent as shown in the representative example. Originality/value The reassembly classification selection method based on the Markov Chain is of great importance in enhancing the economic benefit for remanufacturing enterprises by improving the utilization of remanufactured parts/reused parts.

A Qualitative and Quantitative Analysis of Remanufacturing Research

“…The results showed that the integrated algorithms significantly outperform the intuitive decomposed ones. In another study by Ge et al [112], a reassembly classification selection method based on the Markov chain was proposed as an effective method to improve the utilization of used parts in remanufacturing. The method was executed on a remanufactured crankshaft to show its feasibility.…”

“…To overcome the challenge of unpredictable supply of inventory for future reassembly purposes, an optimization model for simultaneous reassembly and procurement planning to determine the type and number of parts that should be reassembled and procured was created by [112]. Marketing demand was considered along with recycling benefits, and a smartphone was used as an example of the method.…”