
 
is in formulation. The e-Brainstorming provides a 
structuring frame to express, formalize and 
reformulate ideas. There is no moderator, the group 
has to be self-moderated. 
The questionnaire is scripted with an easy tagged 
language, writable in a form, in a mobile phone 
application for instance, then sent to a web server. 
After generation on a server, a return mail is sent to 
the author with the URL of the web questionnaire, to 
be distributed to the chosen participants. e-
Brainstorming can be applied in three modes: 
without free comments, with free comments, with 
free comments and capacity for adding new 
questions. Among the features: new questions are 
highlighted, participants can check a box “Does not 
interest me”, they can access statistics and graphics; 
the system uses traces to evaluate the collective 
intelligence phenomenon. Data can be exported: it is 
possible to exploit it in information processing 
systems (semantic web, etc.). Cheap, easy and quick 
to implement, it can be used with distributed 
participants. This is another example demonstrating 
that technology can change spatiotemporal 
interactions between individuals (Lancieri et al., 2005). 
3.2  Delphi, Real-time Delphi 
“The primary strength of Delphi is its ability to 
explore, coolly and objectively, issues that requires 
judgment” (Gordon, 2003). In the 1950s, on demand 
of the US Army, RAND (Research ANd 
Development - a thinktank) was in charge of 
creating a method to make forecasts from the 
opinion of experts about the possibility (etc.) of an 
enemy attack during the Cold War. RAND achieved 
the Delphi method. A sample of experts on the topic 
of the study enters an iterative process of 
questionnaires, administered by researchers, which 
stops when a pre-defined criterion has been reached. 
Iterative process: the questionnaire has to be 
prepared, the questions refined. In a first 
questionnaire, the experts are asked to provide their 
judgment. Data collected is analyzed, synthesized. 
The next round begins with the sending of a new 
questionnaire. The experts have to be more accurate, 
some extreme positions have to be reassessed, 
justified (Gordon, 2003). There are multiple rounds 
until a defined criterion is reached, then the 
administrator stops the questionnaires. Gordon says 
that at the end, more often than not, group of experts 
move toward a consensus. If not, the reasons are 
known. The reasons and arguments for the 
consensus as well as for disagreements can be highly 
valuable and useful: with this material, it becomes 
possible for planners to make  judgments.  Synthesis  
is done to reduce the force of oratory of some people, 
by this way every participant is equal; the Delphi 
method was designed to encourage a true debate. 
Okoli and Pawlowski (2004) have compared a 
traditional survey approach with the Delphi method 
in order to investigate what would be the critical 
success factors for e-commerce in Sub Saharan 
Africa. In a traditional survey, a questionnaire is 
designed, the participants respond, data collected is 
analyzed. In the Delphi method, a questionnaire is 
designed, submitted to a group of experts, responses 
are analyzed, then the questionnaire is re-designed 
and re-submitted and this process is repeated. The 
sample of the Delphi method is made of some 
experts on the topic (literature recommends 10 to 18 
experts). In a traditional survey, a large sample is 
preferred, for generalization. Individuals responses 
are averaged in a traditional survey while in the 
Delphi method, “Studies have consistently shown 
that for questions requiring expert judgment, the 
average of individual responses is inferior to the 
averages produced by group decision processes; 
research has explicitly shown that the Delphi method 
bears this out”. For a traditional survey, reliability is 
an important concern, assured by multiple tests, 
while in a Delphi study, the experts have to revise 
their responses, the importance degree is different. 
In a traditional survey, the construct validity is 
assured in the design phase and participants only 
respond. In the Delphi method, the experts are asked 
to validate the design (researchers' interpretation and 
categorization of the variables). Participants are 
always anonymous in a traditional survey. In the 
Delphi method, respondents are anonymous to each 
other but not to researchers, then, if a participant 
drops-out, researchers are able to discover the reason 
by asking directly. Non-response is an error to be 
reduced in traditional survey while in the Delphi 
method, experts have been selected and solicited to 
give their opinion. In a traditional survey, the quality 
depends on the question, design, the follow-up, the 
respondents... while in the Delphi method, multiple 
iterations provide rich data, furthermore there may 
be follow-up interviews: interviewers can come with 
open-ended questions to learn more. 
In 2004, the Defense Advanced Research Project 
Agency (DARPA) asked for the development of a 
Delphi-based method for improving the speed of the 
Delphi method. A company, Articulate Software, 
made the “Real-Time Delphi”. This computerized 
method is quick and there can be more participants. 
They introduced Artificial Intelligence and Natural 
Language during the analysis phase of non-
numerical answers. It works “roundless”: every 
ICAART 2012 - International Conference on Agents and Artificial Intelligence
522