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The
bathtub curve: A description of the normal life cycle curve of a product.
It's great when you're at the top, but watch out when your product approaches
obsolescence! |
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The S curve: Describes
the investment needed to develop a product. Rate of investment is high
during inital development phase. It levels out during the mature phase,
but then, when a product reaches maturity, an increasing rate of investment
is needed to avoid obsolesence. |
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