Product launches like the iPad, and then iPad 2, are the exception.  Few bring the groundbreaking success that the businesses and people doing the launch desire.  Most, in fact, fail.  Joan Schneider and Julie Hall of the PR and marketing firm Schneider Associates manage product launches for a living.  And they say there are   In the latest Harvard Business Review, they share these five reasons Why Most Product Launches Fail:

Flaw 1: The company can’t support fast growth.

Flaw 2: The product falls short of claims and gets bashed.

Flaw 3: The new item exists in “product limbo.”

Flaw 4: The product defines a new category and requires substantial consumer education—but doesn’t get it.

Flaw 5: The product is revolutionary, but there’s no market for it.

In this HBR Idea Cast, Schneider and Hall discuss the challenges facing marketers and new product developers when it comes time to launch an idea or a product: