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usability level UL. For example, the expected quality for strategy i can be
determined as:
ii
i
ulflULFLf ×=),(
(5)
The proposed strategy quality function will be applied to measure accessibility
for determining product qualities in terms of platform design strategies. The next
section discusses a coalitional game model for determining a platform design
strategy.
2.3. Phase 3: Determine a Platform Design Strategy
A coalitional game is designed to model situations wherein some of players
have cooperation for seeking a goal in a game (Osborne and Rubinstein, 2002). A
coalitional model focuses on the potential benefits of the groups of players rather
than individual players. In the coalitional model, the sets ...