what-when-how
In Depth Tutorials and Information
documentation. However, the main function of these diagrams is to support the
communication processes of participators. Every sociotechnical system usually needs
more than one model to be represented, and in each model, usually more than one
walkthrough needs to be used. If many changes come out after one walkthrough,
it means that the diagram needs to be improved before the next walkthrough. At
this time, a break needs to be added for the participants to improve the diagram.
Figure 13.6 shows the procedure between two walkthroughs.
After conducting the necessary number of walkthroughs, the whole group of
participants should make an agreement on the final diagram.
13.4.2 Applicability of STWT
In this section, three selected techniques which share similar purposes with STWT
will be discussed and compared. For example, JAD is very similar to STWT.
Contextual Design is suitable for requirements elicitation and is based on ethnog-
raphy and feedback of models.
13.4.2.1 JAD
Joint application design (JAD) is a concept developed by IBM in the 1980s [14]. A
workbook is continuously updated in a series of facilitated workshops. As a result,
the workbook in JAD is similar to the diagram in STWT. JAD takes more focus
on the whole scale of system development, while STWT takes more focus on the
detailed discussion of the cooperative work processes.
13.4.2.2 Scenario-Based Techniques
Scenario-based techniques are also used for similar purposes as the STWT. hey
focus on the instances of a process based on text. he interrelationship between a
series of scenarios is not so easy to understand; as a result, some more techniques
are introduced, For example, a technique called CARD was developed to improve
the scenario-based techniques. he cards in the CARD technique are laid out and
related to each other on a table. However, the STWT takes a much deeper look into
organizational processes with strong relation to software systems.
Changes came out,
improve affected
diagram
Current Walkthrough
Next Walkthrough
Figure 13.6
Procedure between two walkthroughs. (From Thomas Herrmann,
GabrieleKunau,Kai-UweLoser,andNataljaMenold(2004).
Proc. Participatory
Design Conference 2004
,Toronto,Canada,July27-31.)
