From OpenSCADAWiki
Requirements to reliability
Ensuring for reliable operation and protection from the unauthorized access to the VCA should be implemented at several levels:
- At the level of the OpenSCADA core.
- At the level of the VCA concept. For each element of the displaying there should be done it's own rights policy for the editing (Development mode), the dynamics and responding to events (Runtime mode) by means of the ownership change (using the functions of the subsystem "Security"), inclusion/exclusion in/from the group and change rights to modify, read and execute, respectively.
- At the level of the single VCA implementation with the generic concept usage.