Selection of Key Component Vendor from the Aspects of Capability , Productivity , and Reliability

1 Department of Industrial Management, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Road, Taipei 10607, Taiwan 2Graduate Institute of Management, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Road, Taipei 10607, Taiwan 3 Faculty of Development Economics, University of Economics and Business, Vietnam National University, No. 144 XuanThuy Road, Cau Giay District, Hanoi 10000, Vietnam


Introduction
In the information, communication, and technology (ICT) industry where technological specifications are phased into an electronic device, the issues of suppliers' competitive advantages are measured more in depth than the terms and conditions of price/cost, product/service quality, or delivery.A key component vendor, as part of business supply chain cells, is devoted to technological skills so as to achieve market driven requirements.When a Wi-Fi IC component adopts technological specifications, deploys a solution design-in technique, dominates 1/2 of a main board cost, and even shares 1/3 of the bill-of-material (BOM) cost in one wireless networking device, the decision to purchase or replace a key component is more than just a bargaining power negotiation conducted by a single procurement department.
Several research studies have released results on the impacts of vendors' (suppliers') characteristics under different industrial viewpoints so as to examine and measure the selection of vendor/supplier alternatives.Appropriate vendors/suppliers can effectively contribute to cobusiness development profits, especially in technology-driven industries.Close buyer-supplier relationships can share business information and technology development trends [1].During the product development stage, the decision to integrate product architecture with a supply chain design is significantly important for industries [2].Thus, matching new product feature developments with the choice of suppliers can impact firm performance, for example, when solutions contain new electronic components and new process techniques in the automotive industry [3].The stable delivery of goods and technology ability are the top two criteria for selecting suppliers in the electronics industry [4].Product quality is one distinct examination attribute of suppliers when outsourcing technological specification products that are applied during a procurement decision process analysis for railway parts [5].Buyers' operations can be severely impacted due to suppliers' 2 Mathematical Problems in Engineering reliability to deliver on time in this outsourced supply chain management era [6].Even appropriate vendor alternatives are implemented when evaluating the quality of product durability in steel component selection [7].For a notebook manufacturer, the lowest unit cost of an outsourced TFT-LCD part is not the first priority for an appropriate supplier [8], whereas for product cost effectiveness, quality stability, and on-time delivery concerns, a garment manufacturing firm's top management evaluates appropriate suppliers through its R&D, marketing, and purchasing departments' evaluation feedback [9].
This paper measures and analyzes one Wi-Fi IC vendor's alternatives by looking at the tactics within the enterprise's organizational culture as well as operation management characteristics in the wireless networking communications industry.Following a review of knowledgeable product design engineers, project managers' judgments, and salespersons' feedback, we find some significant impact factors classified as follows: (i) sensitivity to market competition, the abilities of up-to-date advanced technology, and the skills of financial management through vendors' competitiveness capabilities; (ii) the fact that product price justifies flexibility, production output arrangement, and inventory planning management of vendors' performance; (iii) the confidence in components' quality and delivery as well as the risk management of the vendors.
Fuzzy analytic hierarchy process, which was first proposed by [10], has become one of the most widely used tools for multiple criteria decision making (MCDM).The literature has proposed numerous fuzzy analytic hierarchy process (AHP) methods to solve various types of problems [11][12][13][14][15][16][17][18][19].Among the existing AHP approaches, the extent analysis method proposed by [12] is a commonly used approach that is highly cited and has wide applications.The AHP methodology is utilized to demonstrate a hierarchical structure and to examine the weights of the decision elements reviewed and evaluated by experts, while the proposed fuzzy AHP technique can effectively consider the vagueness of decision makers' opinions on the ranking of alternative suppliers.This study applies the fuzzy AHP technique proposed by [12] to incorporate a vendor's capability, productivity, and reliability characteristics into a hierarchical structure to deploy decision experts' judgment and also implements vague data analysis.
The remainder of the paper is organized as follows.Section 2 presents the research background along with the related literature.Section 3 proposes the fuzzy analytic hierarchy process methodology.Section 4 applies the fuzzy AHP methodology to the selection of Wi-Fi IC component vendor alternatives.Finally, Section 5 draws conclusions and discussions.

Literature Review
Maximizing profits through cost-expenditure minimization is the fundamental philosophy of a corporate operation management strategy, but reviewing the related influential elements is an essential and critical process.For a more global industrial environment, the issue on firms' competition advantage always stresses their operation and the contribution from suppliers' expertise and how it affects the firms' success.Through firms' synergistic effects, suppliers' core competence can be integrated into new product design and business development with the benefits being cost reduction and time efficiency.Reference [20] highlights the importance of high-tech business success through the synergistic resolution of strategic network effects, while [21] examines the contribution of IT resource synergy to organizational performance and how competitiveness is substantial and flourishing.In a technology-driven industry and market environment, the outsourced solutions from knowledgeable suppliers present systematic impacts related to the development of products/projects.Reference [22] indicates that a strong relationship with suppliers can result in new product development outsourcing being controlled quite well in technology-intensive markets.Under a complete business development ecosystem, buyers (customers/users) and suppliers (solution/service providers) are interdependent in a value-added supply chain network.Reference [23] shows that the partner selection of direct suppliers is one of the important success factors for the core business of a mobile business ecosystem.Reference [24] analyzes the effect of early supplier involvement on project team's effectiveness.Through new project/product developers' and contributors' coordination in their supply chain team involvement, continual customer value creation can be achieved.Reference [25] points out that a demand and supply integration mechanism plays a tremendous role due to intrateams' knowledge integration and management.Reference [26] provides insights of coordination between new product development and supply chain management for value creation.
Several research studies look at some factors affecting vendor selection criterion as analyzed by the fuzzy set theory and AHP approaches.Reference [13] indicates that steel quality, cost, and delivery issues for a metal manufacturing company are the major measurement criteria of supplier selection implemented on electronic marketplaces.Reference [17] identifies and measures suppliers' technical ability variable for a washing machine case research on supplier selection.Reference [19] concludes that vendors' financial position, quality, and delivery are the top three factors for a multicriteria supplier segmentation evaluation applied to a case analysis in the food industry.Reference [27] addresses capabilities of suppliers' financial, technical, and production factors that affect a health product firm's decision on supplier evaluation and selection.Furthermore, the risks from geographical location and political and economical stability impact supplier selection [28] and outsourcing risk management due to economic environmental crises [29], while the criteria of risk in inventory control management [30] are prime factors across suppliers and buyers.Reference [31] proposes a fuzzy logic approach to supplier evaluation for development.
In the electronics industry, special material vendors/suppliers mostly play the key role in devoting their capabilities, productivities, and reliabilities to support the final product/solution providers during the new product design or new project development phases.Reference [18] notes that the  [6,30] cost criterion is the first priority of concern, followed by quality, service, and risk, for a Taiwanese digital consumer manufacturer to select its global suppliers.Reference [32] addresses an evaluation process of supplier selection and firmly identifies technique capability as well as design and development ability as the two major influential elements in professional technology for one electronic manufacturer.In the initial stage of new product development, [33] indicates that quality reliability and technological capability are important subcriteria factors adopted for plastic injection vendor selection by a personal digital assistant (PDA) developer.Table 1 reviews the characteristics in the vendor/supplier selection.Reference [34] uses a qualitative, embedded singlecase strategy in shipbuilding industry to explore the importance of supplier capabilities in one shipyard and examines how consistently the shipyard and its 20 suppliers assess the capabilities of the suppliers.

Fuzzy Analytic Hierarchy Process Methodology
This study adopts the extent analysis method proposed by [12] due to its computational simplicity.The extent analysis method is briefly discussed as follows.
Let  1 = ( 1 ,  1 ,  1 ) and  2 = ( 2 ,  2 ,  2 ) be two TFNs, whereby the degree of possibility of  1 ≥  2 is defined as follows: (2) The membership degree of possibility is expressed as where  is the ordinate of the highest intersection point of two membership functions   1 () and   2 (), as shown in Figure 1.The degree of possibility for a convex fuzzy number to be greater than  convex fuzzy numbers is defined as  ( ≥  1 ,  2 , . . .,   ) = min  ( ≥   ) ,  = 1, 2, . . ., . (4) The weight vector is given by where Via normalization, we obtain the weight vectors as  = (( 1 ), ( 2 ), . . ., (  ))  , where  is a nonfuzzy number.In this present case, Chang's method [12] is applied to solve a vendor selection and evaluation problem.We adopt a "Likert scale" of fuzzy numbers starting from 1 to 9 to transform the linguistic values into TFNs, as shown in Table 2.

The Empirical Case Analysis
To a wireless networking technology-driven firm, the intrarelationship management with its vendors is conducted To arrange delivery schedules Risk management (RM- 33 ) T o m a n a g e r i s k f a c t o r s Note: * key subcriteria for Wi-Fi IC supplier selection; * * must subcriteria to judge Wi-Fi IC suppliers' performance and management.
through global business development so as to overcome the limitations of technological knowledge.To become a qualified key component vendor to fulfill system designers' requirements, alternative candidates should be fully and systematically evaluated.This research presents a measurement analysis on a fifty-employee Taiwanese R&D design firm with a very good track record for five consecutive years in wireless networking solution design.The critical decision for this firm is to select an appropriate value-added Wi-Fi IC vendor from two choices: (a) Vendor A is a well-known world-class firm that specializes in networking, computing, and mobile solutions design for home and enterprise users, including applications utilized on digital homes, notebooks, tablets, mobile phones, mobile routers, and so forth; (b) Vendor B is a publicly traded IC design company in Taiwan with a broader range of high-tech product applications, including solutions for implementation on computer peripherals, communication networks, and multimedia.Based on a questionnaire survey feedback from 5 managers (2 electronic engineers, 2 project managers, and one account manager) of each vendor and 7 managers (2 project managers, 2 procurement managers, 1 engineer for firmware, 1 electronic engineer, and one sales account) of the case study's design firm received in October 2013, we apply a methodology to measure the weights of three criteria and nine subcriteria, respectively, and examine the weights of the nine subcriteria versus alternatives from the final score of fuzzy AHP analysis.Table 3 and Figure 2 define the criteria and subcriteria used to evaluate and select Wi-Fi IC vendors.
Based on criteria and subcriteria defined in Table 3 and (1)- (7), we are able to calculate the importance weights of the criteria and subcriteria as well as the weights of alternatives versus the subcriteria in Tables 4-6.
We are now able to obtain the final score of each alternative as Table 7.
The data indicates that the vendor's productivity ( 2 : 0.55) is a relatively greater concern versus the other two criteria (see Table 4).On the weights of the subcriteria, financial stability ( 13 : 1.0) is the most important factor under the decision choice on the capability term, and inventory stability ( 23 : 0.54) and production capability ( 22 : 0.46) impact the greatest upon the productivity issue, while risk management ( 33 : 0.52) and on-time delivery ( 32 : 0.48) hold critical weights under the reliability criterion (see Table 5).For the weights of the two alternatives versus the nine subcriteria, respectively, the Fuzzy AHP approach analysis chooses Vendor B ( 2 : 0.724 versus  1 : 0.276) as the top priority for alternatives selection (see Tables 6 and 7).

Conclusions and Discussions
The selection of key component vendor alternatives involves multiple issues that can be systematically examined through     0.724 market sensitivity on market trends and customer requirements.(iv) The key characteristics to look at during the vendor selection process come from vendors' viewpoints and the solution design firm's examination of the impacts from three criteria and nine subcriteria.(v) The results herein indicate that the strategic vendor evaluation analysis and report can be used as a reference by a firm's operation management when planning a strategy for resource allocation.
In an ICT technology-driven and customer-centric business ecosystem, firms need to structure a value chain mechanism through knowledge sharing network collaboration with key suppliers and customers.The scope and scale of future research should integrate cross-functional cooperation among teams to widely investigate the supply chain value in a global and dynamic context.Given these issues, we note the following.(1) Open innovation (OI), which involves a greater number of ideas, knowledge areas, and experiences contributed by external partners, is the key antecedent of strategic decisions made by firms.(2) Knowledge management (KM), which drives firms by sharing and deploying knowledge to organizations for objective achievement, is a multidisciplined theoretical approach suitable for industrial practitioners in research and analysis.Therefore, in order to build up different research criteria that can be integrated with quantitative measurement analysis theories, for future studies we propose research objectives on customer value creation and supply chain value through the use of multipurpose models.

Figure 1 :
Figure 1: The comparison of two fuzzy numbers.

Figure 2 :
Figure 2: Hierarchy of Wi-Fi component IC vendors' evaluation and selection problem.

Table 1 :
Characteristics released on the vendor/supplier selection references.

Table 3 :
Fuzzy AHP analysis of key Wi-Fi component IC vendors' evaluation and selection.

Table 4 :
The importance weights of the criteria.

Table 5 :
The importance weights of the subcriteria.
the following key results of our study for industries and academia.(i) The added value of the decision process on Wi-Fi IC component vendors' selection encompasses technology know-how, the main IC that makes up the main cost of the solution main board, and the BOM cost performance.(ii) The blueprint of the examination factors focuses on

Table 6 :
The weights of alternatives versus the subcriteria.
the evaluation issues of (a) competitiveness capability, (b) productivity performance, and (c) management reliability.(iii)This study bridges gaps in previous research concerning

Table 7 :
Final score of each alternative.