菜单
  

    demonstrated its efficacy [5–9]. Following the benchmark-
    ing perspective, as well the use of a contrasted tool,
    facilitates the interchange of improvements. It is a tool that
    provides communication solutions for practitioners to
    obtain maximum efficiency and definitions of theoretical
    development points to become a reference among redesign
    techniques [8]. The recent criticism [29] only shows that
    this tool continues being adequate and its flexibility has
    allowed to adapt it to complex situations [5]. A detailed
    description of VSM can be seen in Rother and Shook [30].
    Thus, as improvement tool simplifies the measurement of
    times without added value, so the calculation of indexes of
    lean metrics is easier and it is possible to enhance the
    operative actions with strategic results.
    This paper unifies several gaps and it shows how
    redesign operative actions can achieve high levels of
    performance in a short time and in a real industry, inside
    a context of an assembly line with a small space, and that it
    requires flexibility, that it is studies in-depth. The academic
    literature requires of similar case studies [15].
    3 Methodology
    Methodology is based on the continuous improvement.
    Consequently, it will be a continuous process of status
    study, calculation of metrics, implementation of progress,
    observation of the results, and new decision-making of
    improvement.
    A first design of VSM is realized according to the
    original data from production processes and the layout,
    identifying the key times of each workstation. This design
    represents the starting point of improvement. Next, the map
    950 Int J Adv Manuf Technol (2009) 43:949–958of the parts flow is shown to verify the materials movement
    between the workstations, calculating the productive and
    unproductive times, stocks and metrics that will help to
    characterize the process, and marking some targets of
    progress. This design of the VSM allows the beginning of
    the progress in the manufacturing line [30]. Metrics used
    are DtD and LR. DtD depicts the material flow through the
    value stream, the time it takes for material to flow from the
    receiving dock (or order entry point) to the shipping dock
    (Eq. 1). LR is the ratio of working time of added value to
    DtD or throughput time (Eq. 2):
    DtD ¼ Time for material flow through value stream; ð1Þ
    LR ¼ Added value work time
    DtD : ð2Þ
    Another important issue is to regulate and reduce the
    accumulated stocks. Consequently, it will be necessary to
    establish a control of the accumulated stock. The control
    will be accomplished easily in accessible stores and
    shelves. This activity facilitates the management of parts
    waiting to be processed because the visual control is more
    effective. It will use the takt time [6, 20, 24], a fully known
    lean metric (Eq. 3), as Eq. (4) defines:
    Takt time ¼ Total time available for production per shift
    Required numbers of parts per shift
    ;
    ð3Þ
    Stocks ¼ Time of entire stepTime added value
    Takt time
    : ð4Þ
    Once the takt time is defined, it is possible to establish
    the cycle time, a basic parameter in pull system [6, 24]. So,
    traditionally, objectives such as high machine utilization
    and high production volume are less important when the
    takt time is defined because the aim is work within the time
    [20]. However, a better materials flow can conciliate both
    objectives: work within the takt time and higher LR.
    Next, the necessary progress will be implemented to
    achieve the desired state of the manufacturing process.
    There are two main improvements: firstly, it is a system to
  1. 上一篇:大厦空调系统设计开题报告
  2. 下一篇:钢筋混凝土梁性能评价英文文献和翻译
  1. 在恒载作用下破坏时的再...

  2. 闭环液压能量再生系统英文文献和中文翻译

  3. 塑料成型生产过程中形成...

  4. 冷挤压生产过程的评价英文文献和中文翻译

  5. Tebuthiuron对水产品生产力的...

  6. 甲苯甲基化工艺生产对二...

  7. 乳酸生产英文文献和中文翻译

  8. 杂拟谷盗体内共生菌沃尔...

  9. 河岸冲刷和泥沙淤积的监测国内外研究现状

  10. 十二层带中心支撑钢结构...

  11. 当代大学生慈善意识研究+文献综述

  12. java+mysql车辆管理系统的设计+源代码

  13. 大众媒体对公共政策制定的影响

  14. 乳业同业并购式全产业链...

  15. 电站锅炉暖风器设计任务书

  16. 酸性水汽提装置总汽提塔设计+CAD图纸

  17. 中考体育项目与体育教学合理结合的研究

  

About

751论文网手机版...

主页:http://www.751com.cn

关闭返回