Few people would set out to climb a mountain wearing a blindfold. Yet individuals routinely start businesses without a clear vision. David Feinleib, General Partner at VC firm Mohr Davidow Ventures and founder of four startups, says not doing research on market viability often contributes to major disasters. “If the market takes too long to develop, there is no market; it doesn’t exist. Unless you have one of those rare products that can create a market, you’re dropping a product into a void.” Getting caught up in an idea is easy to do, but the real work of entrepreneurship is in the details.

Here's a list of common reasons entrepreneurs' ideas fail:

• The Idea Doesn’t Solve a Customer Problem

• Barriers to Entry Aren't Taken into Consideration

• Poorly Managed Execution

• Under Capitalizing the Business

• Failing to Evolve the Vision