- Design Decision 1:
Objective: To minimize the cost of construction of a building to achieve a certain strength requirement.
Design Variables: 1) Strength of Concrete
2) Strength of reinforcement
3) Dimension of concrete
4) Dimension of reinforcement
Evaluators: 1) Strength of the structure
2) Construction cost
3) Construction time
Tradeoffs: Construction Cost vs. Construction Time vs. Strength of the structure
- Design Decision 2:
Objective: Minimizing the energy cost with maximizing the solar value
Design Variables: 1) Energy cost per area of walls
2) Solar value per area of roof
3) Construction cost per area of walls
4) Construction cost per area of roofs
Evaluators: 1) Minimizing the energy cost
2) Maximizing the solar value
Tradeoffs: Energy Cost vs. Solar Value
- Design Decision 3:
Objective: To Maximize the total solar insolation with minimizing the total cost
Design Variables: 1) Top radius
2) Top Rotation
3) Middle radius
4) Base radius
Evaluators: 1) Maximizing the total solar insolation
2) Minimizing the total cost
3) Minimizing the total cost per unit of insolation
4) Minimizing the surface area per volume
Tradeoffs: Total Insolation vs. Total Cost vs. Total Cost per Insolation
Chosen Model 3:
The Design Variables chosen are:
1) Top radius
2) Top Rotation
3) Middle radius
4) Base radius
Based on the inputs, the lofted structure is created.
Some constants are fed to obtain the desired outputs.
The evaluators are then calculated according to this.
Then the evaluators obtained based on:
1) Maximizing the total solar insolation
2) Minimizing the total cost
3) Minimizing the total cost per unit of insolation
4) Minimizing the surface area per volume
The case study is then performed according to the evaluators:
And the scattered plot obtained is:
X-Axis represents the Total Cost of construction and Y-axis represents the total solar insolation. The variation of color and sizes represents here the cost per insolation. As can be seen from the scattered plot that for a given value of cost per insolation, the total solar insolation value increases with total cost of construction. Therefore, there’s a tradeoff between the Total Cost vs. Total Solar Insolation. If we join the plot with same value of cost per insolation, the point where the slope is maximum should be the best option to construct the model.