Software Product Line Engineering Basics - Model-Driven and Software Product Line Engineering - page 20

marketing requirements. The solution space is concerned with
the description of one solution to the problem using various
notations ranging from message sequences, architecture, class
diagrams, or source codes. The interplay between the two
engineering steps, problem and solution space, and core assets
is depicted in Figure 2.2. In this picture, we simplify the
development process during engineering when all the steps
of a classic lifecycle are relevant. Thus, we should add tests,
maintenance, documentation, versioning, etc.
In this diagram, the core assets form a central repository to
store and mine assets. These assets can be produced by all the
steps;theyarereferencedintheproductionplanandeffectively
used in application engineering to build products.
Figure 2.2. Domain and application engineering
2.2. Brief history
Thenotionoftheproductlineisratherold;Wikipediaargues
that the oldest assembly line is “The Terracotta Army”