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Home/Magazine Archive/December 2001 (Vol. 44, No. 12)/Collaborative Virtual Environments For Analysis and.../Full Text
Collaborative Virtual Design Environments
Collaborative Virtual Environments For Analysis and Decision Support
The virtual office has been a dream for decades. Computer-supported collaborative environments move us toward this vision by providing services such as integrated desktop conferencing, shared applications, and workflow management. They have been successfully applied to distance learning and collaborative design. In this article, we report on the creation and application of a place-based virtual collaboration environment [7] for distributed analysis and collaborative planning in mission-critical environments for intelligence and defense.
Figure 1 illustrates the elements of the Java Collaborative Virtual Workplace (CVW) used for distributed analysis and collaboration planning. CVW, available via open source (cvw.sourceforge.org), provides an integrated suite of facilities that enable synchronous and asynchronous collaboration, including text chat, audio-and videoconferencing, shared whiteboard, and shared and private data spaces. CVW provides persistence of sessions via recording user interactions as they occur within the context of shared virtual rooms. Drawing upon the lineage of Multi-User Dungeons (MUDs) and incorporating the MUD Object-Oriented (MOO) Client Protocol (MCP), CVW provides location independence and transparency as well as a room metaphor to support context management. Elements of CVW's design have found their way into government systems (for example, Odyssey Collaboration Services1) and commercial products (for example, Ezenia!'s InfoWorkSpace,2 Collabraspace Rooms3). A Palm CVW client provides wireless access to the virtual space. A secure version encrypts client/server communications as well as audioconferences to provide the kind of security necessary for sensitive interactions among globally distributed work teams. Akin to Redhat-like services provided for Linux, a CVW consortium has been formed by industry to provide product support.4
To facilitate reuse and dissemination of place-based collaboration facilities, we have generalized the original services of CVW to create the Java and CORBA-based Joint Collaboration Services (JCS) [3]. In our research and pilots, we have discovered three important abstractions are central to all collaborations: conference, context, and participants. These three elements are explicitly represented in the JCS software (jcs.mitre.org), an open source toolkit for creating collaboration environments. In JCS, contexts are the persistent, objective focal point for organizing activities (including conferences), participants (human and software), information, and applications. Contexts typically contain a list of participants, a conference manager, and a folder of user-published objects. An example of a context is a virtual room with users, documents, and tools. However, many items can serve as contexts including a joint plan, a process, or an organizational element. Conferences are defined by a roster of participants, their roles, and means of communication (for example, multicast audio/video/text).
Role-based access control regulates the ability to join a context or conference. It also controls the ability to manipulate participants or artifacts within them. Participants are either human or software agents with particular roles (for example, administrator, facilitator, expert) with associated rights within particular contexts. To promote standardization, an Object Management Group (OMG) collaboration group was created to establish interoperable collaboration services for which we authored a preliminary set of collaboration services [6] resulting from an initial reference implementation [1].
Virtual Air Operations and Intelligence Analysis
The tasks for which these tools have been applied, including distributed, collaborative air campaign planning [4], are indeed more significant than the technology. Figure 2a illustrates the use of CVW within the Air Force's Joint Expeditionary Force Experiment (JEFX) in which users distributed across land and airborne units communicate and coordinate air tasking orders in a virtual environment. JEFX has grown from one site with a few users to a dozen sites and thousands of users as shown in Figure 2b.
Teams are able to overcome both time and space challenges to perform their tasks faster and more accurately, with fewer resources. For example, during the 1999 exercise, users were able to complete their attack operations in half the time and targeting in approximately 30% less time than previously. Another interesting finding was the air defense and information operations teams reported an over 50% increase in awareness given their ability to share information both synchronously and asynchronously. Furthermore, by enabling split base operations using the collaboration environment, far fewer personnel (hundreds instead of thousands) need be placed in the theater of operations. Moreover, virtual airspace operations can be established within 2448 hours in contrast to the 1015 days required to airlift personnel and equipment into a forward operating location.
We have discovered three important abstractions are central to all collaborations: conference, context, and participants.
A government organization similarly equipped its enterprise with CVW, including its crisis action cells. It currently supports about 4,000 active users globally. Figure 3, an extract from an independent evaluation [2], illustrates the ebb and flow of usage across time. To date, this has included approximately 150,000 logins, 700,000 connection hours, and at peak several hundred simultaneous users working in a virtual room. Figure 4 illustrates the correlation between level of expertise and time online. Session length of inexperienced users (defined as those having fewer than 25 logins) is typically less than two hours long. The center pie chart shows that two-thirds of experienced users (those having over 25 logins) have sessions lasting two hours or more. If we consider users with over 50 logins, then over 80% have sessions lasting over two hoursthe exact opposite of the inexperienced users' pie chart (80% appears to be a maximum). The collaboration environment enables continuous operations worldwide including tasking, processing, exploitation, and dissemination of information to decision makers. The ability to iteratively task collectors and apply cross-functional experts synchronously and asynchronously has both enhanced product quality (for example, through multiple source fusion of expert evidence) and provided more rapid analysis as a result of transforming operations from serial to parallel.
Collaboration requirements from these and other experiences have been formalized in the Department of Defense's software requirements specification [5]. However, we are still learning from exercises and deployments. For example, in a recent exercise, operators were observed to cluster in particular virtual rooms in search of shared situational awareness. Also, conversations from junior to seniors were primarily conducted in text, whereas those from seniors were in audio.
Firms using collaboration environments learn that success depends on addressing issues around infrastructure, scalability, usability, and security, as well as organizational resistance to change and sharing.
Lessons Learned
Organizations deploying collaboration environments learn quickly that success depends on addressing issues around infrastructure, scalability, usability, and security, as well as organizational resistance to change and sharing. Indeed, while technical challenges such as communications bandwidth and human attention limitations remain, solutions such as the use of multicasting for efficient audio and videoconferencing or presence/awareness services are rapidly forthcoming.
The more perplexing challenges are human and organizational. Users of place-based environments soon realize that collaboration needs to include both synchronous and asynchronous interactions. They also learn collaboration can revolutionize existing processing, changing serial processes to parallel ones, and/or enabling more agile organizations. They further discover the emergence of communities of interest, knowledge, and social networks are challenging traditional hierarchical power structures. Biologically inspired models of organizations seem more appropriate than bureaucratic ones. However, advancing distributed, collaborative organizations that can achieve the time, quality, and agility benefits exemplified in our two domain examples, however, is not easy. We have extracted a number of key lessons from various uses of place-based collaboration environments and found that critical success factors include:
- A shared outcome, common goal, or purpose.
- A leader for each group or community. The leader can be a manager, an influential member of the group, or even a professional facilitator. However, without a leader, group interactions tend to decay into chaos and become unproductive and often unsatisfying for the participants.
- Attention to infrastructure scaling and tool usability including training.
- A secure infrastructure and associated management processes (for example, defined roles/relationships and operating procedures) that engender trust among participants.
- Physical meeting/interactions in addition to virtual ones to support the creation and maintenance of relationships necessary for successful collaboration. Collocating initial training can be an ideal time to establish relationships and concepts of operations.
- A high-level champion and an environment that encourages knowledge sharing and collaboration.
Even enterprises that heed these hard-earned lessons still face the limits of current technology and knowledge not to mention bastions of human resistance to change. Important research opportunities remaining include the automated discovery of communities of interest, secure collaboration, scaling to large communities, organizational change, and the facilitation of community.
References
1. Carlson, J., Deus, L., Holland, R., Kordash, J., Krutsch, M., Kurtz, J., Ramsdell, J., and Maybury, M. Collaboration Services Specification. Object Management Group.; www.objs.com/isig/wg-cscw01.html or jcs.mitre.org.
2. Hall, T. A. Practitioner's Guide to Evaluating Collaboration Systems. Community Collaboration Facilitation Center. July 2000; collaboration.mitre.org/practguide/PractionersGuide.html.
3. Kurtz, J. 1998. Demonstrations of JFACC collaboration services: A collaboration architecture and toolkit. In Proceedings of ACM CSCW. (Nov. 1418, 1998, Seattle, WA); www.acm.org/sigchi/cscw98/program/demos.html#kurtz.
4. Maybury, M. T. Distributed, collaborative, knowledge-based air campaign planning. In Proceedings of the NATO/AGARD Lecture Series 200 on Knowledge-Based Functions in Aerospace Mission Systems. (Nov. 617, 1995, Torrejon, Spain, Chatillon, France, and NASA Ames, CA).
5. Multimedia and Collaboration Services. Software Requirements Specification for the Defense Information Infrastructure Common Operating Environment; diicoe.disa.mil/coe/srs/srs_base/SRS1-99.doc.
6. Ramsdell, J. XML in the JFACC Collaboration Services. White paper, June 1998; fofoca.mitre.org/jfacc/xml.
7. Spellman, P. J., Mosier, J. N., Deus, L. M., and Carlson, J. A.collaborative virtual workspace. In Proceedings of International ACM SIGGROUP Conference of Supporting Group Work. (Nov. 1619, 1997, Phoenix, AZ.) ACM Press, NY. Also see sourceforge.net/projects/cvw.
Figures
Figure 1. Collaborative Virtual Workspace (CVW).
Figure 2. a) CVW in use during JEFX. b) Collaboration gorwth in JEFX.
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