Improving Global Quality of Life
Improving Global Quality of Life
Improving Global Quality of Life
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9.2.2 Production using joining technology and economic viability<br />
General<br />
The costs <strong>of</strong> manufacturing technical products depend on the material and fabrication costs. The personnel<br />
costs (wages and salaries, including incidental costs, <strong>of</strong> the people concerned with fabrication) and the<br />
energy and operating material costs, including the depreciations, are parts <strong>of</strong> the fabrication costs.<br />
In particular, the personnel costs are very different all over the world and can be influenced by the<br />
manufacturers to a limited degree only unless they relocate the manufacture to other countries.<br />
The incurred transport costs which will also rise with rising fuel prices however, must be borne in mind in<br />
the case <strong>of</strong> such relocation as well.<br />
Due to mechanisation and automation, the productivity in fabrication can be raised in such a way that the<br />
fabrication costs are lower than without these measures. The operating material costs then become the<br />
decisive factor amongst the manufacturing costs. Wages and salaries then rank in second place only.<br />
The question to be asked however, is what location is sensible for such mechanised or automated<br />
fabrication. The qualification <strong>of</strong> the operating personnel and the available infrastructure for energy and<br />
input material supply as well as for the elimination <strong>of</strong> unplanned installation shutdowns then play a very<br />
essential role in order to decrease downtimes. Therefore, the choice <strong>of</strong> a location for highly mechanised or<br />
automated fabrication frequently leads to locations in the industrialised countries in North America, Europe<br />
or East Asia (Japan and South Korea). Fabrication close to the customer plays an additional role in some<br />
sectors (amongst others, manufacture <strong>of</strong> motor vehicles, energy generation installations, microelectronics).<br />
If customer-specific deviations from standard products are to be allowed, high flexibility is required<br />
in fabrication planning and fabrication control. This necessitates more stringent requirements on the<br />
component supplies, the personnel and the installations and these cannot be satisfied everywhere.<br />
Environmental regulations may be an additional cost factor.<br />
These general deliberations also apply to welding plants and to other manufacturers using joining technology.<br />
The economic significance <strong>of</strong> joining technology is dealt with in Chapter 3.4.<br />
Production using welding and joining technology<br />
In welding and joining technology, there are a few peculiarities in comparison with other fabrication<br />
processes. For example, it is particularly difficult to establish and prove, on the finished product, the<br />
quality <strong>of</strong> the results <strong>of</strong> the manufacturing processes using welding or joining. Therefore, special qualityassuring<br />
measures accompanying the production and manufacture <strong>of</strong> the products are required in close<br />
coordination with the design. These are:<br />
Procedure qualification tests to be performed before the beginning <strong>of</strong> the fabrication.<br />
Fabrication-accompanying tests on test specimens (destructive and non-destructive tests on work<br />
specimens) and on the product (non-destructive intermediate tests).<br />
Personnel qualification and recurring qualification tests for the executing and testing personnel.<br />
Qualified personnel supervision.<br />
Monitoring <strong>of</strong> the manufacturing plants (plant monitoring).<br />
Recurring testing <strong>of</strong> the products during the utilisation depending on the stresses.<br />
98 <strong>Improving</strong> <strong>Global</strong> <strong>Quality</strong> <strong>of</strong> <strong>Life</strong> Through Optimum Use and Innovation <strong>of</strong> Welding and Joining Technologies