Where, an engine is assumed to be assembled from the five sub-parts, i.e.
code number 1 to 5.
It should be noted that the ten elements considered above are not only
major elements but also require major different technologies to produce
them. Therefore, it is essential to consider these parts/components in a
context of global production-logistics operations. In addition, other
items are excluded from this model because they can be supposed to be
procured by each domestic operation, which need rather primitive
technologies.