Abstracts Track 2020

Area 1 - Industry 4.0

Nr:	3
Title:	Analytical Inverse Kinematics Method for 6-DOF Hexa Parallel Robot
Authors:	Hendriko Hendriko
Abstract:	Parallel robot technology has attracted the interest of researcher over the past six decades. One of the advantages of parallel robot compared to serial robot is that the kinematic calculation is relatively simple. In this study, an analytical based approach to calculate the kinematics of 6-DOF Hexa parallel robot, which is called analytical inverse kinematic simulation, was proposed. The manipulator has six identical and independent arms, in which, each arm was constructed by upper-arm and lower-arm. Every arm has the mechanisms with configuration 6-SSR, where S and R refer to spherical and revolute, respectively. The developed kinematic mechanism made the end-effector can be oriented in arbitrary direction. A simulation program based on the proposed algorithm was developed using MATLAB. The method was tested to calculate the rotation angle of the motors for a complex trajectory. The result showed that the algorithm could be used to generate the rotation angle of every motor to achieve the expected position and orientation of the end-effector. Another test was performed to check the implementability of the method to the real robot. The result showed that the deviations were relatively small. It verified that the proposed method could be implemented to the real robot. It also demonstrated that the developed manipulator was relatively accurate.

Area 2 - Logistics and Operations Research

Nr:	2
Title:	An Integrated CRITIC-MOORA-COPRA-Text Mining-based Methodology for Performance Evaluation and Investigation into the Impact of Service Quality on the Performance of 3PL Service Providers
Authors:	Arnab Adhikari, Satender Pal Singh and Adrija Majumdar
Abstract:	Third-party logistics (3PL) service providers play an instrumental role in the performance of the global Supply chain. Several studies focus on operational as well as financial performance assessment of 3PL service providers with the help of a stand-alone reference-point-based multi criteria decision making (MCDM) method and the influence of the service quality on the 3PL service providers’ performance. In this context, the absence of distinct as well as a holistic performance evaluation of the 3PL service providers highlights the interesting research opportunity. Also, the application of a single MCDM technique often exhibits bias towards specific factors. For this reason, the design of an integrated MCDM framework using multiple MCDM techniques is required to ensure robustness. Additionally, ratio analysis-based MCDM methods such as complex proportional assessment (COPRA) and multi-objective optimisation on the basis of ratio analysis (MOORA) have been ignored. Further, the evaluation of the 3PL service providers’ service quality captured through the customers’ reviews and the effect of this service quality on their financial and operational performance has not been paid enough attention. In this context, the application of text mining methods such as topic modelling, Latent Dirichlet Allocation (LDA), and sentiment analysis can yield practical insights. It acts as a motivation for us to develop an integrated CRITIC-MOORA-COPRA-Text Mining-based methodology to assess the performance and investigate the effect of service quality on the 3PL service providers’ performance. The proposed methodology has been applied to the real-life dataset comprising 21 leading North-American 3PL service providers to exhibit the real-life implementation. The findings highlight the positive relationship between the service quality and performance of 3PL service providers.

Nr:	6
Title:	Coordination through Delay Compensation in a Two-node Make-to-Order System with Strategic Customers.
Authors:	Myron Benioudakis, Apostolos Burnetas, George Ioannou and Dimitris Zissis
Abstract:	We analyze the problems of double marginalization and supply chain coordination, as the manifest themselves in a make-to-order system with delay-sensitive strategic customers. Consider a producer who sells a product on a make-to-order basis through a retailer who has direct access to the customer base. In a first model the producer charges a single wholesale price and the retailer responds with a single retail price. Customer demand follows a Poisson process. The orders are served on a first-come-first-served basis. Arriving customers decide to place the order or balk, taking into account the value of obtaining the product, the retail price and the waiting cost of product completion, without observing the number of pending orders. We derive the pricing strategies and the rate of incoming orders in equilibrium. We show that due to a double-marginalization effect, the supply chain is not coordinated, since the total profit is lower than the optimal value that could be obtained if the producer could sell the product directly to the customers. However coordination can be achieved without side payments between the two parties if the producer sells the product through the retailer, but also provides a direct compensation to the customers, proportional to the delay in filling the order.

Nr:	7
Title:	Competition, Fairness Concern and Coordination in High-tech Product Supply Chain
Authors:	Satender Pal Singh, Arnab Adhikari, Amit Sachan and Sayantan Kundu
Abstract:	From the last few decades, the high-tech electronics manufacturing industries are growing rapidly due to the intense use of technologies in different sectors. But the presence of fairness concerns in the supply chain impacts the performance. This paper considers the high-tech product supply chain with one manufacturer as a Stackelberg leader who sells its product to two competing retailers facing price and quality dependent demand. We study how the fairness behavior of downstream members influences the supply chain decision under the wholesale price contract. We consider three models in our study: No retailer is fairness concerned, one retailer is fairness concerned, and both the retailer is fairness concerned. We also investigate the quantity discount contract and coordinate the supply chain using a fixed fee mechanism. Then, we study the impact of distributional fairness concern and substitutability level of products on the decision variables and utility of the supply chain members. We discuss the theoretical implication and managerial insights that will help the decision-maker to strategically plan their policies and make the optimal decisions to deal with fairness concern in the supply chain.