What does the term "not-invented-here syndrome" refer to?

The term "not-invented-here syndrome" refers to a cognitive bias where individuals or organizations tend to distrust or dismiss new ideas, innovations, or solutions that originate outside of their own organization. This phenomenon often stems from a sense of pride in one's own capabilities and the belief that what has been created internally is superior to external contributions. As a result, organizations may neglect valuable insights and innovations that could enhance their operations or product offerings simply because they were not developed within the organization's own walls. This mindset can impede collaboration and innovation since it limits the organization’s ability to leverage external expertise or solutions, potentially hindering overall progress and competitive advantage.