17
C H A P T E R 3
Increasing Difficulty of
Recognizing Product Quality
Improvement
3.1 WEBER–FECHNER LAW
Weber–Fechner proposed the following. ey found out that to recognize the level of stimulus,
proportional increment is needed:
R
R
D
constant
:
is became known as the Weber-Fechner law and we can understand it more easily if we
take up this example.
If a man who usually speaks in a small voice raises his voice, people easily understand that
he raised his voice. But, if a man who always speaks in a loud voice raises his voice a little, people
would not recognize.
3.2 PRODUCT SERVICE SYSTEMS (PSS)
e term Product Service Systems (PSS) is often heard of these days. But, we must be careful
about what “service” here really means.
In traditional engineering, end products were our primary concern; our focus was on func-
tions. In most cases, service in PSS is discussed in this traditional engineering mindset, i.e.,
service is considered as another function.
Why do engineers start paying attention to service? e following explains why. At the
early stage of product development
S (increment of stimulus) is very large, so customers can
easily recognize the improvement. However, product quality is continually improving and that
quality is approaching its ceiling (Fig. 3.1).
erefore, it becomes increasingly difficult for the producer to develop products that will
convince the customer of the improvement in quality of their products. And what makes the
matter worse is that the demand is rapidly diversifying and personalizing.
If service is added as another function, it will make a difference and the customer will
recognize improvement in product quality easily. us, although the word service is used, it is
discussed in the product-focused framework.
18 3. INCREASING DIFFICULTY OFRECOGNIZING PRODUCTQUALITY IMPROVEMENT
Performance
Time
Figure 3.1: Quality improvement.
..................Content has been hidden....................
You can't read the all page of ebook, please click here login for view all page.