It runs in a web browser on a desktop PC or a tablet.
When you start PRSM in your browser, a 'room' is created for you in which to draw your network. You can add other users to this room to share the work. Only those with access to the room can see what is being created.
The network or map can be anything that has items (or 'factors' or 'nodes') connected by links (or ‘edges').
They may be sitting around a table, discussing the map as it is created face to face, or working remotely, using video conferencing or the chat feature that is built into the app.
Everyone can participate because every edit (creating nodes and links, arranging them, annotating them, and so on) is broadcast to all the other participants as the changes are made.
PRSM is secure — the only way to gain access to a map is if you have the web address of the shared ‘room’, a random string of 12 letters.
Encoded data is transmitted between users using a server located in Ireland, and so does not leave the jurisdiction of the GDPR. You can save maps to your local computer in PRSM’s own format, save an image of the network, or export maps in one of several standard network formats.
PRSM is GDPR compliant: for details see our privacy notice.
PRSM has been developed by the
Centre for Research in Social Simulation and the
Centre for the Evaluation of Complexity Across the Nexus (CECAN)
at the University of Surrey, UK
2019 – 2021
with support from the
Economic and Social Research Council
and the University of Surrey
PRSM was designed and written by Nigel Gilbert.
With thanks to all who helped inspire, suggest features for and test PRSM, including Paul Brand, Brian Castellani, Robin Gilbert, Kevin Jahns, Robert MacKay, Kavin Narasimhan, Alex Penn, Bazil Sansom, Helen Wilkinson, and many others.