I would like to discuss a task similar to “The next step falls between responsibilities.”

The source of the difficulty still needs clarifying.

Possible first output: A description of the obstacle, open questions and the next decision, including the people needed to make it.

I would like to check whether this first step fits our task and discuss terms for further work.

Our situation: [add details]
What we want to change: [add details]
What we have tried: [add details]