6.3 Suspended Ceiling Design Process - Bilkent University

(1999) applied these concepts to a building design process model and
interpreted processes as individual design tasks, flows as design
information flows, data stores as drawings etc., and external entities as
clients, local authorities, etc. Abou-Zeid and Russell (qtd. in Karhu,
2001) also used data flow diagramming to study communications
between participants of building design process.
Figure 3.4: An Example Data Flow Diagram showing Concept and
Scheme Design Data Flows (Baldwin et al., 1999)
The method has the capability of presenting the models in a hierarchical
form through decomposition. Data flow diagrams are not concerned with
how processes are performed but view systems from an information
point of view. They can also represent the iterations in processes, but
do not provide any means to deal with them. Moreover, the performer of
a process is not modeled with this method (Karhu, 2001).
3.2.1.4 IDEF0
IDEF0 (Integrated DEFinition 0) is a graph-based technique that
captures more details than other graph-based techniques by
representing some of the intra-task complexity. The U.S. Air Force
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