Software Product Line Engineering Basics - Model-Driven and Software Product Line Engineering - page 47

resolution “Passwords will expire in a determined
number of days” , then the PasswordExpire component is
deployed with the rest of the common components.

Decision Resolution Effect

What policy
for Password
expiration
will be used?

Password will
expire in a
determined
number of days

The PasswordExpire component is
deployed with the rest of common
components.

Password will
never expire.

The PasswordNever Expire
component is deployed with the
rest of the common components.

Table 2.1. Example of a textual decision model

Even when decision models help in the process of creating
SPLs,there are still several problems remaining regarding the
gap between variability at a conceptual level and variability at
the implementation level.These problems are important for us
when they are taken into the field of MD-SPL approaches. The
use of MDE is a promising technique to assist and automate
product derivation. We go deeper into these specific problems
in Chapter 4 and Chapter 5.1, which will explicitly deal with
such issues.

2.8. Benefits and drawbacks

On the technical and software engineering side, SPLE
should improve and rationalize the management of the core
assets. We can expect a better quality of the re-usable assets
as they are re-used and tested over and over. It also improves
the architecture of applications, tracks code duplication, and
increases the artifacts re-use. The consistency of all the
assets is better since a global view of the architecture and
of the products is maintained. Requirement engineering is
a mandatory step; it requires strong interactions with the
clients, and thus it provides a more stable and organized set