Four Layers of App Requirements
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Your brilliant app idea is actually four different ideas in one. Seriously.
When you build any system, you have four layers of requirements. First,
there's the big-picture business goal, like "improve customer satisfaction." Then,
what the user actually wants to do, like "I need to log in with a secure password."
Next is the functional part—what the system *does*, like "it must calculate the total cost of
an order." And finally, the quality stuff: how well it performs. Think,
"the system must handle 100 transactions per second." Nailing all four is the secret to
building something that doesn't suck.
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