Phoenix–Sky Harbor – The sixth-largest hub in terms of number of flights and destinations and American's primary western hub. American flies approximately 20 million passengers a year through PHX, which is about 55,000 people per day. Currently American has about 46% of the market share at PHX, making it the airport's largest airline.
Traditionally, many style guides define components as atomic components, which are then used to build more complex molecules. In theory, this works well to create coherent and flexible systems. In practice, however, what often happens is that these re-usable atoms are used many different ways, allowing all kinds of molecules to be created. Again, this opens the door for all kinds of disjointed experiences and makes the system harder to maintain.
The rigidity can also cause drama at the airport, where it can produce uneven customer service, as agents may close out flights before connecting passengers arrive. Isom said he understands the criticism, but said in many cases keeping operational integrity helps more customers. American has 6,700 daily flights, and sometimes it’s easier to put passengers on the next one, rather than hold doors open.
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