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Author: search.filters.author.Kiatcharoenpol, T.Has files: No

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    Optimizing and Modeling for Plastic Injection Molding Process using Taguchi Method
    (2018-06-04)
    Kiatcharoenpol, T.
    ;
    Vichiraprasert, T.
    The objective of this work is to study process parameters of Plastic injection molding. Taguchi method, an unconventional design of experiment, is used as an approach to optimize the process parameters to improve quality characteristic of work-piece. The two responses of experiment are volume shrinkage and total displacement. Orthogonal array (L16) is used to conduct experiments. The result shows that there are three statistically significant factors out of seven factors or process parameters. Such three factors are Melt temperature, Packing time and Cooling time. Linear equations derived from experimental results are constructed and suitable conditions can be obtained from a computer based response optimizer.
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    Implementation of shainin's DOE: A case of plastic injection molding process
    (2017-07-02)
    Kiatcharoenpol, T.
    ;
    Vichiraprasert, T.
    Shainin's Varible Search DOE is one of practical experimental designs which is simply used in industry fields. The less numbers of experiments and basic calculation are the advantage over the classical DOE. In this work, Shainin's method is used to study factors effecting displacement of plastic work-piece in Injection model process. The implementation steps of experiments are provided in detail. After 22 experiments were carried out, it is found that Packing time (E), Cooling time (G) and interaction of EG are significant factors. The fraction factorial, 2<sup>7-3</sup>, is also employed as a comparison to Shainin's method. The results of Shainin's method in-line with those of fractional factorial. It imply the usefulness of this practical DOE.
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    Measuring service quality on educational services of engineering curriculum using SERVQUAL model
    (2017-07-01)
    Kiatcharoenpol, T.
    ;
    Subvaranont, N.
    ;
    Pachayamai, P.
    This study is to investigate the perception and service expectation of engineering student to curriculum to measure quality of service. SERQUAL model developed by Parasuraman et al. is used to compare difference between expected and actually services perceived. The model proposes measuring service quality into five service dimensions. The survey was carried out from third and fourth year students in a case study of engineering faculty. The questionnaires of 1536 respondents from 19 curriculums are analyzed. It shows that the average score of perceived service quality in each dimension are as follow: Assurance 4.85, reliable 4.73, Tangible 4.53, empathy 4.72 and responsive 4.3 of full score of 7. The highest dimension is Assurance and the lowest dimension is Responsive. In all dimension by using t-test hypothesis, there are statistically significant difference between expectation and services perceived. Moreover, it is found that services perceived by students in all curriculums are statistically different. The work from this study would be the guideline for management to use to improve the level of education activity and service in engineering faculty.
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    Correlation of barriers to reverse logistics performance using structural equation modeling
    (2016-12-27)
    Sirisawat, P.
    ;
    Kiatcharoenpol, T.
    The main aim of this research is investigate the relationship between reverse logistics barriers and reverse logistics performance measurement of electronics industry in Thailand. A conceptual model is developed by proposing eight hypotheses. The model is examined using structural equation modeling (SEM). Data are collected via a distributed questionnaire to electronic companies of Thailand. The interesting relationship between reverse logistics barriers and reverse logistics performance are found.
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    A study of reverse logistics practices: A case study of the computer parts industry in Thailand
    (2016-01-18)
    Sirisawat, P.
    ;
    Kiatcharoenpol, T.
    ;
    Choomrit, N.
    ;
    Wangphanich, P.
    The return of end of life products and waste is becoming an important logistics activity due to increasing environmental awareness and government legislation. The main aim of this research is to investigate current process and activities of reverse logistics practices in the computer parts industry of Thailand. Five groups of manufacturers are case studies of this research in which in-depth interviews and unstructured questionnaires are used to discover the current situation, process and activities under reverse logistics practices. The results of the research, interesting situations, problems and directions of the reverse logistics of the computer parts industry were found. The results presented in this research will help researchers and practitioners understand more about reverse logistics practices in the computer parts industry of Thailand and could be a guideline for further research in the computer parts industry and other related industries.
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    A study of critical success factors and prioritization by using analysis hierarchy process in lean manufacturing implementation for Thai SMEs
    (2014-01-01)
    Kiatcharoenpol, T.
    ;
    Laosirihongthong, T.
    ;
    Chaiyawong, P.
    ;
    Glincha-Em, C.
    This study identifies and prioritizes critical success factors (CSF) based on the implementation of Lean Manufacturing for Thai SMEs. After review of International research papers, 12 CSFs were selected and categorized into four resource types from the lens of Resource-Based View (RBV) Theory. These are Organizational, Technology, Human and Financial Resources. Interviews and surveys with Lean experts experienced in SME consultation were carried out to answer the proposed research questions. Analytical Hierarchy Process (AHP) is then applied to prioritize the relative importance of the CSFs. The results show that "Technology resource" is the most important to enhance implementation of Lean in SME organizations. This indicates the knowledge of production technology is a prime key to support process improvement according to Lean methodology. This study contributes to the existing body of knowledge by evaluating and prioritizing CSFs reflecting by grounded theory and expected outcomes at firm level from experts' experience.