Quality-Oriented Classification of Aircraft Material Based on SVM

Abstract

The existing material classification is proposed to improve the inventory management. However, different materials have the different quality-related attributes, especially in the aircraft industry. In order to reduce the cost without sacrificing the quality, we propose a quality-oriented material classification system considering the material quality character, Quality cost, and Quality influence. Analytic Hierarchy Process helps to make feature selection and classification decision. We use the improved Kraljic Portfolio Matrix to establish the three-dimensional classification model. The aircraft materials can be divided into eight types, including general type, key type, risk type, and leveraged type. Aiming to improve the classification accuracy of various materials, the algorithm of Support Vector Machine is introduced. Finally, we compare the SVM and BP neural network in the application. The results prove that the SVM algorithm is more efficient and accurate and the quality-oriented material classification is valuable.

Exploring the Potential Use of the Birnbaum-Saunders Distribution in Inventory Management

“…where (in units of the product) is given in (1) and , , and are given in (4); is the holding cost (in $ per $ per unit of time); is the ordering cost (in $ per each replenishment order placed); is the shortage cost (in $ incurred whenever a stock-out occurs); and (⋅) is the PDF of the LTD given in (2). In order to minimize the expected TC defined in (5), we optimize the indicator given in (1) altogether with given in (4).…”

“…Inventory management permeates decision-making in countless firms. The topic has been extensively studied in academic and corporate spheres, for example, Braglia et al [1] and Cai et al [2]. The key questions which the inventory management seeks to answer, usually influenced by a variety of circumstances, are as follows: when to order, determining an economic order quantity (EOQ) or lot size, and how much safety stock (SS) to keep, establishing a reorder point (ROP); see Namit and Chen [3] and Porras and Dekker [4].…”