In this kind of development environment, where releasing a product
a month before a competitor translates to millions of dollars, the productivity of
the development process is vital. General-purpose methods were not seen as useful
in this kind of development environment: ???UML and other methods say nothing
about mobile phones. We were looking for more,??? said a Project Manager. Nokia
also detected that existing languages and generators assumed ???clean-sheet???
implementations, whereas the majority of Nokia??™s projects built on existing previous
work. In this case, the DSM solution was built on top of existing architectures.
Tooling was based on the available metamodeling tools and code generators
(MetaCase, 2000).
The DSM solution was developed especially to improve developer productivity.
The productivity improvements were to be achieved by applying the following
strategies:
. Working at higher abstraction levels so that designers don??™t have to know
everything. They can focus on designs rather than on how to implement them in
code.
. Linking designs to code generators so that designers are effectively ???writing
code??? as they design. This worked very well in practice as modelers did not
usually realize the mappings from designs to code.
. Underpinning the development process with a tool effective enough that no one
will want to develop outside the tool.
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