Multi-Attribute Tradespace Exploration (MATE) is a method that has been used extensively in system-level design. When used with EEA, MATE may design for a variety of “ilities,” including affordability. As shown in RSC, MATE combined with EEA may be used to consider dynamic uncertainty of contexts and needs. PLEEAA extends RSC with two new constructs to enumerate viable portfolios: a portfolio selector and a portfolio design tool. Additionally, a “portfolio capability tree” is also implemented to link system performance to portfolio utility.