Short answer: A task with one owner gets done because one person knows it’s theirs. A task shared by several people is easy for each to assume someone else has it.
The problem with shared ownership
Everyone waits for someone else.
Nobody feels the deadline.
Blame gets spread instead of problems fixed.
One owner, many helpers
Others can help or observe. One person owns the result.
Frequently asked questions
What about team tasks?
Even team tasks need one coordinator who owns the result.
Try it with your team
Check your open tasks for shared owners. Please Do It is free for 30 days, with no credit card required.