Hi there,
This is a vast area within software development and it can potentially ends up in long debate :-) I've been trying to find the right model and metrics to assess the quality of our software under development (Who didn't at some stage ?). I've settled on a close variation to ISO-9126 as I thought it covers all important aspects of our software, namely: Functionality, Reliability, Usability, Efficiency, Maintainability and Portability. The difficult part is finding the right metrics for each subcharacteristics. I've detailed our thinking in this post:
http://www.fredberinger.com/software-quality-metrics-and-model/
But I still have trouble with some of the metrics. Especially:
Learnability, analysability, testability and replaceability.
Any idea you'd consider for reasonable metrics for these ?
Are you using other interesting model you might want to share with us ?
Fred