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Articles 541 - 570 of 839
Full-Text Articles in Business
Herding Behavior ,Case Of Listed Companies In Thailand, Patipol Prawangsuk
Herding Behavior ,Case Of Listed Companies In Thailand, Patipol Prawangsuk
Chulalongkorn University Theses and Dissertations (Chula ETD)
We examine herding behavior in the Thailand stock market under different market conditions, industries, firm sizes, and investor types. We also study herding behavior during the Covid19 period. Lastly, we further develop a new factor that is a qualified price-risk element for stock return. The results show evidence of herding behavior in the Thailand stock market during the extreme positive and negative markets condition. And the herding behavior exists in twenty sectors out of twenty-six. The small-cap portfolio shows a greater magnitude of herding behavior compares with a large-cap portfolio. During the covid19 period, the result indicates herding behavior is …
Impact Of Monetary Policy On Firm’S Risk-Taking Position And Investment Decision, Sakolwat Seneekosol
Impact Of Monetary Policy On Firm’S Risk-Taking Position And Investment Decision, Sakolwat Seneekosol
Chulalongkorn University Theses and Dissertations (Chula ETD)
The recent economic crisis drives monetary policy to boost the economic situation. However, the side effect of monetary policy also dilutes firms' behavior in both risk-taking and investment decisions. This research investigates the effect of monetary policy from the international and local level using firms in 5 Southeast Asia stock markets. The risk and investment decision measurement technique in this paper using Expected Default Frequency and the investment dummy variables. The risk-taking model is based on panel fixed effect regression and the investment decision model is using a fixed-effect logistic model. This paper also extends the analysis to cover the …
Inflation Level And Equity Mutual Fund Flows In Aggregate, Boontarikar Dangsritham
Inflation Level And Equity Mutual Fund Flows In Aggregate, Boontarikar Dangsritham
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper investigates the relationship of inflation level and aggregate equity mutual fund flows using Thai evidence. Sample period covered from 2006 to 2020. For the first objective, we investigate the relationship between realized inflation and net flow of money into equity mutual fund. Next, since investors are forward-looking, we extend the analysis to investigate the same relationship using forecasted inflation instead. Lastly, money supply is increasing since 2008 because of the first launch of QE. Also, inflation trend becomes lower since then. Our further exploration is whether there is a change in the relationship between inflation and aggregate equity …
Industry Size And Deal Initiation: Evidence From Merger And Acquisition, Sirilak Sriburapar
Industry Size And Deal Initiation: Evidence From Merger And Acquisition, Sirilak Sriburapar
Chulalongkorn University Theses and Dissertations (Chula ETD)
Targets in small industries are more likely to initiate the deal than targets in large industries. Bidders are willing to pay more for target-initiated deals in small industries than in large industries. This research finds empirical evidence that industry size significantly impacts firms' decision to initiate the deal and bid premium. Targets in small industries are more plausibly to initiate the deal because the demand for target corporate assets is lower. Consequently, they receive lower premiums compared to targets in large industries. Surprisingly the impact of target-initiated deals on premiums significantly depends on target industry size, the negative impact of …
Inside The Black Box Of Financial Analysts: What Drives Systematic Forecast Optimism?, Christian Schmidt
Inside The Black Box Of Financial Analysts: What Drives Systematic Forecast Optimism?, Christian Schmidt
Chulalongkorn University Theses and Dissertations (Chula ETD)
Despite past failures and a higher standard of regulation, excessive forecast optimism among financial analysts is still observable. It is mainly attributed to incentives provided by an underlying affiliated relationship. This paper investigates diverse market settings in the Thai stock market between 2005 and 2017 to break down the incentive structure in the analysts' forecasting process. First, banks and brokerage houses with an affiliated mutual fund family show an extreme forecast behavior, especially when the fund family is backed by high capital and has a large stake in the covered firm. Secondly, full-service banks are among the most optimistic analysts …
Mutual Fund Recommendations On Fund Flows And Returns, Rachapoom Karnasoot
Mutual Fund Recommendations On Fund Flows And Returns, Rachapoom Karnasoot
Chulalongkorn University Theses and Dissertations (Chula ETD)
Using Thailand open-end mutual fund samples from 2017 to 2019, this study examines the impact of analysts’ recommendations on mutual fund flow and return. We decide to use the analysts’ recommendation from two big management companies in Thailand who publicly released their analysts’ recommendation in weekly periods, SCBAM and KAsset. We hypothesize and find the recommendations have a significantly positive impact on mutual fund flows and found no significant impact on return. Our study further examines the risk-adjusted return and observe no significant excess return is generated from recommended mutual funds.
Option Returns Around Earning Announcement In London, Thanawat Thangchadakorn
Option Returns Around Earning Announcement In London, Thanawat Thangchadakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
While prior studies find that returns on straddles constructing before earning announcements are positive in U.S. equity option market, we further investigate and find that returns on straddle constructing before earning announcement are positive in London Stock Exchange either. The logic behind this positive return while return on straddles are generally negative is option traders underestimate volatility of upcoming earning announcement period due to recency bias.
Premium, Ownership And Operating Performance In Rto, Chawalit Rungpiboonsopit
Premium, Ownership And Operating Performance In Rto, Chawalit Rungpiboonsopit
Chulalongkorn University Theses and Dissertations (Chula ETD)
A reverse takeover is an alternative method of listing instead of IPO. Compared to IPO, firms using RTO can avoid the stringent requirement of IPO and disclose less information. Hence, these transactions were viewed as suspicious transactions. The U.S-SEC also issued the warning that investors should be careful when considering investing in the RTO firm. However, it is unlikely that investors in the market can separate between the good RTO firm and the bad RTO firm because of the loose requirement of RTO which led to the arising of asymmetric information between investors and RTO firm. As a result, in …
The Impact Of Etf Mechanics And The Bank Of Japan Intervention On The Intraday Volatility Of The Underlying Stocks, Tharita Jumroonwat
The Impact Of Etf Mechanics And The Bank Of Japan Intervention On The Intraday Volatility Of The Underlying Stocks, Tharita Jumroonwat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Due to their low trading costs and superior liquidity, exchange-traded funds (ETFs) attract short-term liquidity traders. The liquidity shocks can pass to the underlying securities through the ETF mechanism. ETF may therefore increase the non-fundamental volatility of the underlying stocks. I carry out the test daily which allows me to timely measure the high-frequency variable of arbitrage activity between Nikkei 225 ETFs and their components. I find the consistent result with Ben-David et al. (2018) that stocks with higher ETF holding display significantly higher volatility and the intensity of arbitrage activity, proxied by stock-level mispricing, magnifies the impact of ETFs …
The Lead-Lag Relationship Of Block Trade Single Stock Futures And The Underlying Stocks: Evidence From Thailand, Pimnapa Wongvisavakorn
The Lead-Lag Relationship Of Block Trade Single Stock Futures And The Underlying Stocks: Evidence From Thailand, Pimnapa Wongvisavakorn
Chulalongkorn University Theses and Dissertations (Chula ETD)
According to the efficient market hypothesis, there should not be any lead-lag relationship of the spot and futures price of the financial assets; however, many empirical studies have suggested otherwise. This study uses the Vector Error Correction Model (VECM) and Granger causality test with the daily trading data of Thailand’s block trade single stock futures and its underlying securities of 42 companies from 2016 to 2020. It reveals both unidirectional and bidirectional relationships of spot and futures markets with a less dominant role of the futures market in the price discovery function. None of the sample companies have both long-run …
The Market And Specific Sector Stock Prices Reaction Around Corporate Bond’S Credit Rating And Outlook Changes – Evidence In Thailand, Kittika Sansanavanee
The Market And Specific Sector Stock Prices Reaction Around Corporate Bond’S Credit Rating And Outlook Changes – Evidence In Thailand, Kittika Sansanavanee
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study examines stock price reaction around credit rating and outlook changes in Thailand. We collect data from stocks listed in SET (The Stock Exchange of Thailand) which issued corporate bonds. These bonds must be listed in TBMA (The Thai Bond Market Association) and were rated by either Tris or Fitch rating Thailand between 2002-2020 (corporate bond credit rating and outlook change). We also study further about the effect of these credit rating events in 3 sectors of stock - Banking, Finance and Property Development. The empirical result shows that good credit events provide significant positive abnormal stock return after …
The Presence Of Style Drift And Its Effects In Thailand’S Equity Mutual Funds, Nuttha Lertwattanakiat
The Presence Of Style Drift And Its Effects In Thailand’S Equity Mutual Funds, Nuttha Lertwattanakiat
Chulalongkorn University Theses and Dissertations (Chula ETD)
Active equity mutual funds have become a widely popular investment for investors with high risk tolerance due to potentially getting a higher return with the benefit of diversification and professional management. Investors can make decision on selecting funds by looking at “style”. Style is viewed in two dimensions; size and value-growth orientation at stock level. It helps investors to see how fund manager select stocks and the overall style of stock holding for a whole portfolio. Investors can take this factor into considerations to build portfolio to align with their strategy. But what will happen if the style is changed …
The Relationship Between Fees And Performance Of Domestic Equity Funds In Thailand, Thapanee Suphapitakpaiboon
The Relationship Between Fees And Performance Of Domestic Equity Funds In Thailand, Thapanee Suphapitakpaiboon
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study inclusively examines the relationship between fund fees and performance of open-end domestic equity funds in Thailand from 2010 to 2019 to analyze the domestic-equity fund market in 2 main dimensions: the market competitive and conflict-of-interest between the duties of asset management companies (AMCs) to their parent bank and to unitholders through fund fee channel. The study investigates the relationship of (1) fund fees, (2) fund fees set by bank subsidiaries, and (3) fund fees set by large-bank subsidiaries with its performance in term of both returns over benchmark and Jensen’s alpha. Based on the results, investors paid higher …
Unexpected Movement In Monetary Aggregates And Its Effect On Asset Price In Thailand, Paripon Sriboon
Unexpected Movement In Monetary Aggregates And Its Effect On Asset Price In Thailand, Paripon Sriboon
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper aims to develop a structural vector autoregressive (SVAR) model to study the dynamic relationships between broad money and other macroeconomics variables in Thailand. The structural restrictions on SVAR model are based on economics intuition and novel finding that money does not react contemporaneously to transitory component of the short-term interest rate. The model also features stock price and house price as the different response of asset price and goods price will be monitored. There are total of seven monthly endogenous variables included in the model covering the period of 2010 - 2020. The result based on forecast error …
Determining The Tracking Error And Value-At-Risk Of An Active Portfolio When Combined With A Passive Portfolio With Value-At-Risk Constraint, Nuttawoot Ladee
Determining The Tracking Error And Value-At-Risk Of An Active Portfolio When Combined With A Passive Portfolio With Value-At-Risk Constraint, Nuttawoot Ladee
Chulalongkorn University Theses and Dissertations (Chula ETD)
When an asset manager manages a portfolio, he usually imposes a TE or a VaR limit on his portfolio to control portfolio risks. However, a portfolio may be divided into different portions. In our research, we consider a portfolio that consists of an active portion and a passive portion. Having a VaR budget of an entire portfolio, we propose methods to determine TE and VaR limit on the active portfolio and illustrate them by using real data. In the empirical part, some problems can occur when we relax certain theoretical assumptions such as (1) stocks in an investment universe can …
Double Bottom Pattern Recognition For Trading Strategy, Chusana Nuntanart
Double Bottom Pattern Recognition For Trading Strategy, Chusana Nuntanart
Chulalongkorn University Theses and Dissertations (Chula ETD)
We utilize the Double bottom pattern, which is a common and the most easily recognized reversal pattern in the technical analysis approach, to seek the existence of abnormal returns from 1 Jan 2009 to 31 Dec 2019. The general event study methodology was used to statistically test for the existence of abnormal returns from 611 stocks in SET. We concluded that there was an existence of abnormal return from trading with the Double bottom pattern strategy. This led to the conclusion that the Thai stock market might be not as informationally efficient as academics have conjectured.
Option Pricing Using Local Volatility Function: How To Specify Its Knots?, Wisuth Raweerojthanatt
Option Pricing Using Local Volatility Function: How To Specify Its Knots?, Wisuth Raweerojthanatt
Chulalongkorn University Theses and Dissertations (Chula ETD)
European options of an asset are priced following a continuous 1-factor diffusion model and the generalized Black-Scholes equation. Volatility knots are determined by many specifications that are the number and the location of knots at any stock price and time to expiration. Considering the volatility knots as a set of decision variables, we can approximate the local volatility function with a bicubic spline function to compute option values fitted to a finite set of market data by solving a constrained nonlinear optimization problem. With the real market data of SET50 Index options, pricing accuracy of different knots’ specifications are demonstrated. …
Reverse Stress Testing On Non-Elliptical Jointly Distributed Multivariate Data, Chevincee Werawanich
Reverse Stress Testing On Non-Elliptical Jointly Distributed Multivariate Data, Chevincee Werawanich
Chulalongkorn University Theses and Dissertations (Chula ETD)
No abstract provided.
The Hybrid Pareto Distribution, Implied Risk-Neutral Density And Option Pricing, Purin Luanloy
The Hybrid Pareto Distribution, Implied Risk-Neutral Density And Option Pricing, Purin Luanloy
Chulalongkorn University Theses and Dissertations (Chula ETD)
This paper aims to develop a new European option pricing model based on the Extreme Value Theory (EVT). We assume that, in the risk-neutral probability measure, simple negative returns of the S&P500 index follow the Hybrid Pareto (HP) distribution. Then, we derive closed-form pricing formulas for call and put options according to the risk-neutral pricing method. Additionally, we assume that the distribution has a fat tail. Our study’s benchmark model is the Generalized Extreme Value (GEV) model proposed by Markose and Alenton (2011). We estimate model parameters by minimizing the root-mean-square error. The results show that the HP model provides …
Factors Influencing Adoption And Usage Probability Of Car Sharing In Bangkok, Baweena Ruamchart
Factors Influencing Adoption And Usage Probability Of Car Sharing In Bangkok, Baweena Ruamchart
Chulalongkorn University Theses and Dissertations (Chula ETD)
This thesis aimed to examine factors influencing adoption and usage probability of car sharing in Bangkok. There were two phases of study. The first phase was examining the factors influencing the probability of using of car sharing. The latter was designed to assess customers' attitudes toward the intention to use car sharing. Both studies employed a quantitative method of data collection and analysis. Study One assessed the likelihood of using car sharing from customers' characteristics in three main groups: socio-economic status, travel behavior and car-sharing preferences. The data were collected through a questionnaire with the target population group. In total, …
Factors Influencing Adoption And Usage Probability Of Automated Parcel Lockers, Orawee Thongkam
Factors Influencing Adoption And Usage Probability Of Automated Parcel Lockers, Orawee Thongkam
Chulalongkorn University Theses and Dissertations (Chula ETD)
The study proposes a model to predict probability to use Automated Parcel Locker (APL) in Bangkok by adopting Multiple Linear Regression. In addition, to help business to market to the right target and increase the intention to use, the study investigates factors influencing Intention to use APL by employing Structural Equation Model (SEM). The framework is developed based on Technology Acceptance Model (TAM) and other external factors. The questionaries were conducted for both methods with 718 observation and 500 responses, randomly selected. The results show that variables best predict probability to use APL is price set with discount, followed by …
Drivers For Reverse Logistics Packaging In Circular Economy For Thailand Beverage Industry From The Manufacturer Perspective, Patiparn Sajjasophon
Drivers For Reverse Logistics Packaging In Circular Economy For Thailand Beverage Industry From The Manufacturer Perspective, Patiparn Sajjasophon
Chulalongkorn University Theses and Dissertations (Chula ETD)
In Thailand, Municipal Solid Waste (MSW) problems exist, and 15% are due to post-consumption beverage packaging that is left behind after the point of consumption. This study aimed to analyze driving forces in reverse logistics of post consumption packaging for Thailand beverage industry and examine impact of sustainability. 39 variables related to drivers, key success factors including sustainability also modeled. Questionnaire has been designed based on 11-point rating scale and Item-Objective Congruence performed by experts from the academic and business. Sampling conducted through 210 respondents from alcoholic and non-alcoholic manufacturers. Collected data analyzed by using structural equation modeling for hypotheses …
Digital Transformation Factors Influencing The Sustainability Of Logistics Service Providers In Thailand, Putthiwat Singhdong
Digital Transformation Factors Influencing The Sustainability Of Logistics Service Providers In Thailand, Putthiwat Singhdong
Chulalongkorn University Theses and Dissertations (Chula ETD)
This research explores and develops digital transformation factors influencing the logistics service-provider sector in Thailand while also examining the impact of sustainability factors associated with digital transformation. Divided into two parts, Part one of the theoretical study framework covers 21 factors relating to logistics, including drivers, objectives, implications, and success factors. The second part concerns 23 factors associated with logistics sustainability, including economic, environmental, and social aspects. This quantitative empirical research was conducted using an online questionnaire instrument, and a structural equation modeling (SEM) technique was used to test the proposed model. The findings from 545 respondents who related with …
Development Of Tod Readiness Index And Its Application To Transit Station In Bangkok, Srisamrit Supaprasert
Development Of Tod Readiness Index And Its Application To Transit Station In Bangkok, Srisamrit Supaprasert
Chulalongkorn University Theses and Dissertations (Chula ETD)
Studies on the Transit-Oriented Development (TOD) for Bangkok are found sparingly. The TOD concept is a supportive development for the rapidly changing city in order to reduce urban transport problems while encouraging people to shift transport modes to use public transportation instead of private cars. This study discusses the context of TOD in the density, the design, and the diversity of land use around transit stations among successful stations in many countries. There were 18 station areas in Bangkok which, by using the TOD Readiness score, the assessment of the stations implies that the higher scoring transit stations are more …
Servitization Model For Chemical Industry In Thailand, Tanyaporn Kanignant
Servitization Model For Chemical Industry In Thailand, Tanyaporn Kanignant
Chulalongkorn University Theses and Dissertations (Chula ETD)
Chemical industry traditionally produces and sells tangible goods in large volume and high price cometition. Recently, firms in chemical industry provide additional services to their customers. Several manufacturers change from tangible product suppliers to both product and service providers. This movement is called servitization (Vandermerwe & Rada, 1988). Chemical servitization levels can be classified into 4 categories which are product only, service added to the product, service differential the product and service is the product (Thoben, Eschenbacher, & Jagdev, 2001). The objectives of this paper are to construct servitization framework for chemical suppliers to shift to product service integration and …
Supply Chain Collaboration For Sustainability In Thailand's Dairy Industry, Virayos Vajirabhoga
Supply Chain Collaboration For Sustainability In Thailand's Dairy Industry, Virayos Vajirabhoga
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study gathered potential 95 variables from a literature review. Through the process of expert review, these were refined into 49 critical variables. Moreover, pilot study, with participation from co-operatives and farmers, aims to develop conceptual frameworks in six areas: performance and commitment, internal and external collaboration, measurement and evaluation, joint operation, sharing and innovation, and negotiation. Furthermore, 26 factors were identified clearly by exploratory factory analysis. The main study was conducted via a paper-based questionnaire with 1,224 respondents nationwide. The proposed 11 hypotheses attempted to identify the structural relationships among the constructs in the model. The result confirmed the …
Innovative Zero-Waste System For Building Wastewater Recycling And Food Waste Management, Thammananya Sakcharoen
Innovative Zero-Waste System For Building Wastewater Recycling And Food Waste Management, Thammananya Sakcharoen
Chulalongkorn University Theses and Dissertations (Chula ETD)
Urbanization leads to concerns about environmental impacts due to the increasing food waste and wastewater generation. The study aims to develop an innovative zero-waste system for food waste and wastewater management in the building using the combination of a single-stage anaerobic digester and the Moving Bed Biofilm Reaction-Membrane Bioreactor (MBBR-MBR). The comprehensive analysis for innovative zero-waste system development is conducted including (1) survey and interview the target market group (universities) to determine the factors affecting the intention to use the zero-waste system ; (2) develop a zero-waste system prototype, and test operation for measuring the performances ; (3) evaluate the …
การตัดสินใจเลือกรูปแบบในการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง, นพรัตน์ นุ่มศิริ
การตัดสินใจเลือกรูปแบบในการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง, นพรัตน์ นุ่มศิริ
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้เป็นการศึกษาการตัดสินใจเลือกรูปแบบในการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง มีวัตถุประสงค์เพื่อศึกษาปัจจัย และพิจารณาเลือกรูปแบบที่เหมาะสมที่สุดสำหรับการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง เริ่มจากการรวบรวมปัจจัยที่เกี่ยวข้องจากการศึกษาทฤษฎีและงานวิจัย แล้วนำมาหาค่าดัชนีความสอดคล้องเพื่อคัดเลือกปัจจัยที่ส่งผลต่อการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง โดยนำกระบวนการลำดับชั้นเชิงวิเคราะห์ มาช่วยหาลำดับความสำคัญของปัจจัยที่ส่งผลต่อการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมือง รวมถึงช่วยในการตัดสินใจเลือกรูปแบบที่เหมาะสมที่สุดในการจัดการมูลฝอย จาก 3 รูปแบบ คือ กองทัพอากาศดำเนินการเอง การจัดจ้างองค์กรเอกชน และ การจัดจ้างองค์กรของรัฐ โดยการเก็บข้อมูลแบบสอบถามจากผู้เชี่ยวชาญด้านการจัดการมูลฝอยของกองทัพอากาศจำนวน 7 ท่าน ผลการศึกษาพบว่า ปัจจัยที่ส่งผลต่อการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมืองสูงสุด 3 ลำดับแรก คือ ปัจจัยด้านการจัดการมูลฝอยเพื่อตอบสนองยุทธศาสตร์สิ่งแวดล้อมของกองทัพอากาศ ปัจจัยด้านความปลอดภัยต่อบุคลากร และ ปัจจัยด้านหน่วยงานที่รับผิดชอบ สำหรับรูปแบบการจัดการมูลฝอยของกองทัพอากาศ ณ ที่ตั้งดอนเมืองที่เหมาะสมที่สุด คือ กองทัพอากาศดำเนินการเอง
การประเมินตัวชี้วัดการขนส่งผลไม้สำหรับส่งออกบนเส้นทาง R3a กรณีศึกษาบริษัทขนส่ง Abc, ปรียาพร สายตา
การประเมินตัวชี้วัดการขนส่งผลไม้สำหรับส่งออกบนเส้นทาง R3a กรณีศึกษาบริษัทขนส่ง Abc, ปรียาพร สายตา
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้มุ่งเน้นพัฒนาตัวชี้วัดด้านการขนส่งผลไม้ผ่านระบบคอนเทนเนอร์ทำความเย็น บนเส้นทาง R3A ผ่านการทบทวนวรรณกรรมจำนวน 20 งานวิจัย เพื่อมาช่วยในการกำหนดปัจจัยเชิงโลจิสติกส์ที่สำคัญในการนำมาสู่การกำหนดตัวชี้วัดที่เกี่ยวข้อง โดยกำหนดปัจจัยหลักเชิงโลจิสติกส์จากปัจจัย 3 มิติของสำนักโลจิสติกส์ ได้แก่ มิติต้นทุน 1 ตัวชี้วัด มิติเวลา 2 ตัวชี้วัดและมิติความเชื่อถือได้ 4 ตัวชี้วัด โดยตัวชี้วัดสร้างมาจากการสนทนากลุ่ม ระดมความคิดจากคณะผู้บริหารระดับสูงของบริษัทขนส่ง ABC และกำหนดค่าน้ำหนักผ่านกระบวนการลำดับชั้นเชิงวิเคราะห์ (AHP) ที่ให้ผู้เชี่ยวชาญจำนวน 9 คนประเมินความสำคัญของปัจจัย ซึ่งสามารถสรุปลำดับความสำคัญตามค่าน้ำหนักของปัจจัยหลักจากมากไปน้อยดังนี้ มิติด้านต้นทุน (47%) มิติด้านความเชื่อถือได้ (36%) และมิติด้านเวลา (17%) เมื่อทำการเก็บข้อมูลย้อนหลัง 3 ปี พบว่าบริษัทขนส่ง ABC มีคะแนนตัวชี้วัดเต็ม 5 คะแนน ได้แก่ ความสามารถในการส่งมอบสินค้าตรงเวลา อัตราความเสียหายของตู้ทำความเย็นที่เสียระหว่างการขนส่ง และอัตราการเกิดอุบัติเหตุของรถขนส่ง ทางด้านตัวชี้วัดที่บริษัทควรให้ความสำคัญ ได้แก่ อัตราการวิ่งเที่ยวเปล่า 2.75 คะแนน สุดท้ายภาพรวมของการประเมินตัวชี้วัดการขนส่งบริษัทขนส่ง ABC เฉลี่ยทั้ง 3 ปีอยู่ที่ 4.38 คะแนน แม้ว่าการประเมินผลโดยรวมจะอยู่ในระดับดีมาก แต่ยังพบว่ายังมีตัวชี้วัดบางตัวที่บริษัทยังไม่สามารถจัดการได้ดีเท่าที่ควร ดังนั้นบริษัทควรให้ความสำคัญมากยิ่งขึ้นเพื่อลดผลกระทบและป้องกันปัญหาที่จะเกิดขึ้นในอนาคต
การปรับปรุงกระบวนการผลิตเพื่อลดความล่าช้า กรณีศึกษา บริษัทผลิตเซมิคอนดักเตอร์, รัศมิมน โพธิ์ทอง
การปรับปรุงกระบวนการผลิตเพื่อลดความล่าช้า กรณีศึกษา บริษัทผลิตเซมิคอนดักเตอร์, รัศมิมน โพธิ์ทอง
Chulalongkorn University Theses and Dissertations (Chula ETD)
งานวิจัยนี้ เป็นงานวิจัยเชิงปฏิบัติ ที่ศึกษาแนวทางในการปรับปรุงประสิทธิภาพกระบวนการผลิตของบริษัทผลิตเซมิคอนดักเตอร์ ซึ่งในปัจจุบันประสบกับปัญหาความล่าช้าในกระบวนการตรวจสอบคุณภาพของผลิตภัณฑ์ Small Outline Integrated Circuit (SOIC) โดยมีสาเหตุหลักมาจากการที่ประสิทธิภาพของเครื่องจักรไม่เต็ม 100% จึงส่งผลให้การตรวจสอบคุณภาพสินค้าใช้เวลามากกว่าที่ได้คำนวณไว้ ซึ่งปัญหาเรื่องประสิทธิภาพของเครื่องจักรนี้ เป็นผลสืบเนื่องมาจากการเปลี่ยนอุณหภูมิไปมาของเครื่องจักรจากการจัดตารางตรวจสอบคุณภาพที่ไม่เหมาะสม ผู้วิจัยจึงได้เสนอแนวทางในการปรับปรุงประสิทธิภาพ 3 แนวทาง ได้แก่ การนำเทคนิคการจัดสมดุลสายการผลิตและการจัดตารางการผลิตมาประยุกต์ใช้ การนำทฤษฎีเกี่ยวกับการบำรุงรักษาเครื่องจักรมาปรับใช้ และการนำแนวทางทั้งสองมาประยุกต์ใช้ร่วมกัน เพื่อเพิ่มอัตราผลผลิต ลดรอบเวลาที่สินค้าอยู่ในกระบวนการ และเพิ่มค่าความพร้อมใช้งานของเครื่องจักร หลังจากนั้นจึงสร้างแบบจำลองสถานการณ์เพื่อประเมินผลลัพธ์จากการปรับปรุงประสิทธิภาพ โดยผลการวิจัยพบว่า หลังจากปรับปรุงประสิทธิภาพของกระบวนการตรวจสอบคุณภาพด้วยวิธีการที่ผู้วิจัยได้เสนอนั้น สามารถเพิ่มอัตราผลผลิตได้ถึงสัปดาห์ละ 45.49% และลดรอบเวลาที่ชิ้นงานแต่ละล็อตอยู่ในระบบได้ถึง 15.06%