How to say “Politically describe avoidance” professionally

Level 1: I've observed that [Team Member]'s engagement with the [Specific Task/Project] has been less direct than anticipated, which may impact our timeline. Perhaps we could clarify expectations or re-evaluate the resource allocation for this component.

Level 2: Regarding the [Specific Task/Project], there seems to be a prolonged period of non-engagement from [Team Member]. It might be prudent to explore if there are underlying dependencies or shifting priorities that are influencing their participation.

Level 3: Per the original project charter and the RACI matrix we established, the accountability for [Specific Task] remains with [Team Member]. While the current status shows no discernible progress, I'm sure they're merely 'strategizing' their approach, perhaps even 'optimizing' for a later, more impactful delivery.

Level 4: The lack of discernible progress on [Specific Task] from [Team Member] is now directly impacting downstream deliverables, specifically [Consequence]. We need a concrete action plan and an updated timeline from them by [Date] to mitigate further delays.

Level 5: They're just not doing it.

Level 1: We've been awaiting your feedback on [Specific Deliverable] to proceed with the next phase. To ensure we stay on track with our agreed timeline, could you please advise on its status or any questions you may have?

Level 2: To avoid any potential delays in the project timeline, we wanted to gently inquire about the status of the [Specific Approval/Feedback]. We understand your schedule is demanding and are ready to address any queries you might have.

Level 3: Per the mutually agreed-upon Statement of Work and project plan, the critical path item [Specific Approval/Feedback] was scheduled for completion by [Date]. We trust the current 'pending' status indicates a thorough internal review process, perhaps even an 'enhanced strategic consideration' before final sign-off, rather than, say, a complete oversight.

Level 4: The lack of response regarding [Specific Approval/Feedback] past the agreed deadline of [Date] is now impacting the project timeline and incurring [Specific Consequence, e.g., idle resources, scope creep]. We require your input by [New Date] to proceed without further cost implications or revised delivery dates.

Level 5: Pay us or approve it.

Level 1: I'm noticing that the [Specific Task] still requires attention, and I wanted to check if there are any blockers or if I can assist in moving it forward. It's important for our shared progress.

Level 2: Regarding the [Specific Task], I haven't seen any updates, and its completion is a dependency for my next steps. Could you provide an estimated completion timeframe, or let me know if there's a specific reason for the delay?

Level 3: Just circling back on the [Specific Task] which was assigned to you during our last sprint planning. I'm assuming its current 'unstarted' status indicates a strategic deferral, possibly a 're-prioritization' that wasn't communicated. My work continues to patiently await its upstream dependencies.

Level 4: The [Specific Task] was due on [Date] and remains incomplete. This delay is now holding up [Your Task] and will impact our team's overall deliverable. I need a firm commitment on when this will be completed, or we need to reassign it.

Level 5: Get to work.