Early #startups at the end of 20th century adopted engineering procedures similar to those of big companies: long development cycles, product launches, detailed business plans, goals, etc.
This business school approach ended in failure almost always.
Losers blindly execute a rigid product management and introduction methodology, trusting everything to the vision and the funding.
Engineers use to hide behind and don´t show up to the customer. But without daily feedback from the users there´s nothing.
On the other hand, marketing people are not product or tech savvy.
This all creates a huge gap between the product and the market, and its at the root of the failure of many projects.
Successful #productmanagement happens when one team reports to one leader. That leader manages the information loop from customers back to product development, and back out to customers in a continuous flow, called “product-market fit”.