Various organisation can have various purposes. These purposes are not necessarily in line with each other, although they do not have to be completely opposed.
Starting with the idea that a shared purpose within an organisation makes its border clear, the not aligned purposes within a supposed unit make borders more difficult to define.
When the quality of the products is important for some and the price is an important matters for others, the ways the organisation interacts with its suppliers and customers vary as a result. Quality might require intense cooperation and co-makership with a selected group of suppliers, whereas low price level could require flexible relationships that make it easy to switch. Both policies in the same organisation will result in a border full of conflicting signals and make the interaction a mixed experience.