Information handling in Open Design

In Open Design, the constraints of various stakeholders that are incorporated into the LP model constitute the information paid attention to. Initially, the architect keeps the model simple. He or she starts with a limited number of constraints. Sensitivity analysis (giving the effect of a constraint on the solution space) with that simple model reveals which of these constitute used information and which can be considered to represent confusion information. Whenever relevant used information information information paid attention to

relevant used information information information paid attention to

Cassandra information

confusion information

Figure 5.2 Two approaches to reducing Cassandra information

Cassandra information confusion information

A. Ineffective:

• Cassandra information reduced (shaded area) by increasing total information paid attention to;

• with help of computer and telecommunication systems.

B. Effective:

• Cassandra information reduced (shaded area) by simultaneously reducing confusion information;

• with help of expert consultants.

Figure 5.2 Two approaches to reducing Cassandra information used information Crucial constraints in the LP model, used information Crucial constraints in the LP model,

information All constraints incorporated in the LP model

Figure 5.3 In Open Design, both information paid attention to and relevant information change when new constraints are added to the LP model information All constraints incorporated in the LP model

Figure 5.3 In Open Design, both information paid attention to and relevant information change when new constraints are added to the LP model a new stakeholder with a new constraint is added to the model, it is again sensitively analysis which determines if the new constraint represents used information and thereby reduces Cassandra information.

In Open Design, therefore, what is used information and what is confusion information is not constant but changes over time. Actually, it changes every time a new constraint is added to the LP model (Fig. 5.3).

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