If you just want to write a paper on the software itself, the list provided in user4936 answeruser4936 answer is perfectly fine.
If you want to conduct a research on how the tool actually enhanced certain processes in a firm, you might go for a paper in an Information Systems venue.
Start looking for articles in what you can access of the Top 8 journals for IS. Look for "decision support system" and add some of your paper's keywords. You will find plenty of papers with methodologies.
Be aware that IS venues demand very strong theoretical background and motivation for a study. They like theory a lot. So, be prepared to read a lot and to write a lot :-)