There’s a business analyst/architect group, a process innovation group, a design thinking group, a technology group and more. Not all of these groups are internal. Some of them are external. Tech vendors try to push new technologies. Management consultants try to push their new or upgraded service. Partner firms want to prove a point. More complexity.
Groups are likely global. Even your own colleagues are located across multiple offices in multiple countries. Even more complexity. The group expected to do a particular activity is actually a firm your vendor recently acquired. This firm won’t easily work with your vendor’s other groups. Sure, the firm was acquired to fill a missing or complementary capability, but probably also to elevate your level of perception about the vendor.