Construction of adjusting coefficients for sewing time of GSD system for knit products in Vietnam
DOI:
https://doi.org/10.61841/8b4aqz26Keywords:
Motion study; time study GSD; MTM; polo-shirt; T-shirt; sewing time, preparation timeAbstract
The article presents the results of determining the adjustment coefficient between the actual values and theoretically calculated values according to both the MTM method and GSD predetermined time standard system of sewing time on the machine, and preparation time when sewing Polo-Shirt and T-Shirt from Single Jersey fabric. The study was conducted at Fashion Star Limited Company (Ha Noi) and Hanosimex Single Share-Holder Limited Company (Ha Nam). The simultaneous influence of stitch length (cm) and stitch density (stitch/cm) on sewing time was studied for the Polo-Shirt and T-Shirt products. The research was done on 4 kinds of machine, including single needle lockstitch machine, overlocking machine (1 needle and 3 threads), sewing machine (2 needles and 4 threads), and hemming machine (2 needles and 3 threads); and 3 kinds of single jersey fabrics, which are thin, medium, and thick fabrics. Besides, simultaneous influences of two factors, the size of the shirt and distance of semi-finished products (cm) to the sewing machines, on the sewing time were investigated. Experiment results were analzyed and processed using Design Expert 11.0. The results were used to construct the experimental regression equations, which showed correlations between the research factors,which are sizes and distances, and sewing time or preparation time. The optimal values of sizes and distances were determined to achieve the goal of minimizing preparation time. The adjustment coefficients between the theoretical calculation according to both MTM method and the GSD system and the practical results were identified. In addition, the formulae to calculate sewing time based on stitch density and stitch length values for 4 types of sewing machines and single jersey fabric with 3 thickness were built using orthogonal experimental planning method and multivariate optimization.
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References
[1]https://vinatex.com.vn/nganh-det-may-viet-nam-dat-muc-tieu-tro-lai-39-ty-usd-trong-nam-
2021, Vietnam National Textile and Garment Group, 2021.
[2] Nguyen Tiep, Textbook: “Labor norms”, Labour and social publishing house, 2008. (1
authors)
[3] V.T.Mai, V.T.Uyen, Textbook: “Organization and labor norms”, Publishment of National
Economics University, 2016. (2authors)
[4] GSD (Corporate) Limited, “General Sewing Data”, 2018.
[5]. Mst. Murshida Khatun,“Effect of time and motion study on productivity in garment
sector”,International Journal of Scientific & Engineering Research, vol 5, Issue 5; 2011.(1
authors)
[6] D.M.Huong, P.T.Thao,“Study on the influence of some factors on sewing conditions to the
time of sub-processing of knitting garment workers by MTM method and General Sewing
Data”,Proceeding of the 5th National Conference on Mechanical Science & Technology Hanoi,
Scientific and Technical Publisher, ISBN:978-604-67-1103-2, pp 1492-1499, October 5th,
2018.(2 authors)
[7] D.M.Huong, D.C.Luc, P.T.Thao,“Construction rational operation process logical product
Polo-Shirt Men's clothing knitted materials in VietNam”,The 1st National Scientific Conference
on Textile, Apparel and Leather Engineering; Agricultural Academy Publisher, ISBN: 978-604-
924-374-5; pp 235-240, October 2018.(3 authors)
[8] D.M.Huong, D.T.Mai, P.T.Thao,“Application of lean menufacturing tools to improve
production efficiency in line of kniting garments”,Journal of Science & Technology of Hanoi
University of Industry,no 43, pp 88-94; Hanoi, Vietnam; ISSN 1859-3585, 2017. (3 authors)
[9] D.M.Huong, H.T.Thom, P.T.Thao, “Study on the sewing operation process affect to
productivity of the knit Polo-Shirt sewing line”, Journal of Science & Technology of Hanoi
University of Industry, no 39,Hanoi, Vietnam, pp 86-91; ISSN 1859-3585, 2017. (3 authors)
[10] V.T.Nhu, P.T.Thao,“Research on solutions to improve laborproductivity by improving
motions and working speeds of the sewing workers”,Vietnam Mechanical Enginering
magazin,no 3; ISSN 0860-7056, 2014.(2 authors)
[11] P.T.Thao, L.T.Trang,“Building standard operating procedures for sewing the main subassemblies of knitted products”; The 1st National Scientific Conference on Textile, Apparel and
Leather Engineering, Agricultural Academy Publisher, ISBN: 978-604-924-374-5; pp 183-194,
October 2018. (2 authors
[12]P.T. Thao, N.Q.Thoai,“Research on analysis of operation procedures and optimisation of
performance time for sewing operations of knitted products”, Journal of Science & Technology
of Hanoi University of Industry,vol 56, no 3, Hanoi, Vietnam, 2020. (2 authors)
[13] P. T. Thao, T. T. Yen,“Study On Factors Affecting Time To Sewing T-Shirt”,The 2st
National Scientific Conference on Textile, Apparel and Leather Engineering; Agricultural
Academy Publisher, ISBN: 978-604-316-057-4; pp 294-306, 2021. (2 authors)
[14] T. T. Yen, P. T. Thao,“Empirical research to determine the influence of factors on the
sewing time of products from knitted facbrics on Sewing Lines”; Journal of Science &
Technology of Hanoi University of Industry, vol 56, no 6,Hanoi, Vietnam, pp 106-113, 2020. (2
authors)
[15] P. T. Thao, T. V. Tung,“Building Database on the Operation Process and Performance Time
for Sewing Operations of Kintted Garment Products”, Journal of Science & Technology of Hanoi
University of Industry, vol 57, no 1,Feb2021, Hanoi, Vietnam, pp 91-96, 2021. (2 authors)
[16] N.V.Lan, Textbook: “Statistical processing of experiment data”, Publishment of National
University Ho Chi Minh City, 2003. (1 authors)
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