Steve Blank: The Sharp End of the Stick
steveblank.com
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My feeling is that the product development team (with a focus on optimising for more sales) is the equivalent of the sales team in that case...
Would love to hear other people's thoughts on this though.
But that only comes at the end of the sales process - you would still need marketing/sales to get to that point.
Although, if your targeting a technical crowd then having a great product and some PR would most likely make the product dev team most influential in a sale.