Considering the recent research studies that both validate and support our model as
well as those that challenge it, we conclude that our original model and related con-clusions [8] still form a sound basis for IS success measurement even in the e-commerce
environment. We believe that our proposed changes in the updated D&M IS
Success Model are largely changes in degree, not in kind. The addition of “service
quality” and the collapsing of “individual impacts” and “organizational impact” into
“net benefits” still preserve the parsimonious nature of the model.