The choice between recovering existing structures (such as the window surrounds, PSU and overhead components shown here), the redesign and modification of a structure (such as the chairs, divan, refreshment center, and lav assembly, shown here and in other photos), or the complete replacement of a feature, is determined by the principal’s judgment of price and value. Avia presents the costs and benefits of the various options, makes its recommendations, and then works to optimize the final selection.