The Decision-making Design Study on Sewing Machine Design

The Decision-making Design Study on Sewing Machine Design

The speed of the new product development in
sewing machine industry is slow. Due to the influence of the
general situation of sewing industry, time and funds,
combined with the uncertainty of the development result,
the enterprises find hard to make decision on how and when
to develop their new products or improve old ones, though
they have eager and strong desire. To meet the very
demands, the article introduces the QFD, sets up the house
of quality, and ensures the best group of the improvement
measures and contribution under the restriction of the cost

From the view of Life Cycle of Engineering Design
theory (LCED), modern Design starts on the voice of
Customer and ends with the customer’s use and reject.
And one of the basic features of modern design is
‘Modern design is driven by customer’.[1] Many studies
agree that the early decision-making design, though
sharing 8% cost of the whole, determines the effect of
85% cost in the life cycle. Therefore, how to scientifically
make the decision in early stage of design is very
important. VS sewing machine
The decision-making design has been studied in the
Angle of Knowledge Reasoning by Ma Jun[2], in the view
of entropy method by Zhou Chaoyang etc[3]. But their
studies both concentrate on evaluation and choice among

the design cases, and have not involved the transformation
of the VOC to the engineering technological target and the
operating specification reasonably and effectively. Zhao
Daozhi[4] has made study the decision-making design to
decide which engineering method gives priority to
meeting the VOC at the constraints of time and cost. But
as the major subjects, the different customers’ preference,
purpose and focus were ignored in the weighing values of
customer’s demands .
QFD, used in the article, is a way to convert Voice of
Customer (VOC) into Product Quality Characteristics
(PQC), to determine the weightings of the each PQC, and
to plan these items. [5]
Currently, the new product development speed in
sewing machine industry is slow. Due to the general
situation of sewing industry, time and funds, combined
with the uncertainty to the development result, the
enterprises find hard to make decision on how and when
to promote their new products, though they have eager
desire.
In view of this atmosphere, the article introduces the
QFD, setups the house of quality, and ensures the best
group of the improvement measures from all under the
restriction of the cost.https://www.vssewingmachine.in/

Setting up the improved design house of quality
Take the example of certain sewing enterprise, the
enterprise applies QFD method to setting up house of
quality, when they plan to improve their products. HOQ
includes 4 customer’s requirements: Weak sewing
applicability (CR1), oil stain pollution to the sewing
products (CR2), high power consumption (CR3), loud
noise and big vibration (CR4) and slow step of the product
reform.(CR5), and 9 improvement measures are:
improving cloth-feeding mechanism (EC1), improving
thread-picking mechanism (EC2), adopting hermetic fuel
supply (EC3), introducing oil-free technology into some
mechanism, such as hook and picking thread bar (EC4),
using servomotor (EC5), servomotor driving the up-axis
directly (EC6), driving with synchronous belt (EC7), whole
machine simulation analysis and moving parts lightweight
(EC8) and design outsourcing (EC9). The number of
selected typical customers is 4, that is: g0=4. the
customer’s requirement

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