News launched

14 Jan 2014 — Gert van Valkenhoef

We are happy to announce the official launch of, our web-based tool for multiple criteria decision analysis. The tool supports the elicitation of partial value functions and criteria trade-offs using several methods, and makes use of our R packages and the Patavi web service wrapper to compute the MCDA results.

Please keep in mind that is still in beta, so don’t expect perfection just yet. This is the first component of the ADDIS 2 project to be launched. Its development has allowed us to prove the feasibility of a number of our architectural decisions, as well as further define the components and frameworks that will be used in ADDIS 2.

MCDA web app updated

01 Nov 2013 — Gert van Valkenhoef

We have just updated our web based multiple criteria decision analysis (MCDA) preference elicitation tool. This component will be used in ADDIS 2.0 to support benefit-risk decisions. It is currently available online at The new features include:

  • Workspaces and scenarios: store the intermediate results of preference elicitation in your browser.
  • Overview: shows the elicited preference information in one place.
  • Exact SWING: preference elicitation leading to an exact weighting.
  • Extensive refactoring of the client-side code and many bugfixes on both the client and server side.

You will need a recent browser; we recommend Mozilla Firefox or Google Chrome. Several examples are provided. You can also load your own benefit-risk assessments by exporting them from ADDIS 1.16.4 or later. We would be glad to hear your feedback.

R packages updated

01 Nov 2013 — Gert van Valkenhoef
  • Version 0.5-1 of the GeMTC R package fixes several bugs and improves the behavior of plotting functions. See the gemtc NEWS file on CRAN for a full changelog.
  • Version 0.3 of the hitandrun R package adds the ability to deal with arbitrary linear equality constraints, in addition inequality constraints. See the hitandrun NEWS file on CRAN for a full changelog.
  • Version 0.2-1 of the smaa R package fixes two minor bugs and improves the performance of the ranking entropy calculation. See the smaa NEWS file on CRAN for a full changelog.

GeMTC R package updated

24 Sep 2013 — Gert van Valkenhoef

Version 0.5 of the GeMTC R package has several new features:

  • Support for node-splitting models
  • Model fit diagnostics: Deviance Information Criterion (JAGS only)
  • Better support for rank probabilities

For a full changelog, see the NEWS file on the GeMTC CRAN page.