The planning process for the construction of a new home involves the balancing of three variable conditions and one fixed condition. The fixed condition is the site itself. The cost to prepare the site for construction is dictated by terrain and accessibility. The three variable conditions are:
When planning a home, only two of these conditions can be changed from variable to fixed. The third condition must remain a variable and will be determined by the first two. For example, if the homeowner wants to determine the price and size of the house, then the specifications and architectural style will have to variable in order to meet the required price and size. It is not possible to specify all three conditions.
The homeowners need to choose the two variables that are most important to them. After making these required determinations, the builder and architect will then control the third variable based on the choices of the first two.