  A large number of computational scientific research projects make use of open
source software packages. However, the development process of such tools
frequently differs from conventional software development; partly because of
the nature of research, where the problems being addressed are not always fully
understood; partly because the majority of the development is often carried out
by scientists with limited experience and exposure to best practices of
software engineering. Often the software development suffers from the pressure
to publish scientific results and that credit for software development is
limited in comparison. Fundamental components of software engineering like
modular and reusable design, validation, documentation, and software
integration as well as effective maintenance and user support tend to be
disregarded due to lack of resources and qualified specialists. Thus innovative
developments are often hindered by steep learning curves required to master
development for legacy software packages full of ad hoc solutions. The growing
complexity of research, however, requires suitable and maintainable
computational tools, resulting in a widening gap between the potential users
(often growing in number) and contributors to the development of such a
package. In this paper we share our experiences aiming to improve the situation
by training particularly young scientists, through disseminating our own
experiences at contributing to open source software packages and practicing key
components of software engineering adapted for scientists and scientific
software development. Specifically we summarize the outcome of the Workshop in
Advanced Techniques for Scientific Programming and Collaborative Development of
Open Source Software Packages run at the Abdus Salam International Centre for
Theoretical Physics in March 2013, and discuss our conclusions for future
efforts.

Software Engineering;Mathematical Software