How to say “Use 'respectfully'” professionally

Level 1: I respectfully need to clarify the current priorities before taking on this additional task to ensure alignment with our existing project commitments. Could we briefly discuss how this fits into the broader roadmap?

Level 2: I appreciate you bringing this forward. Respectfully, could we review how this aligns with the documented scope of work for the quarter, as my current bandwidth is fully allocated to critical deliverables?

Level 3: I've reviewed your request. Respectfully, perhaps we should consult the RACI matrix for this initiative, as my understanding of my responsibilities for this particular phase differs slightly from your proposed action. I'm keen to ensure no documented process is overlooked.

Level 4: I understand your intent with this request. Respectfully, I must reiterate that this falls outside my current role's scope, and taking it on would directly impact the deadlines for projects X and Y, which are already committed.

Level 5: Respectfully, no.

Level 1: Thank you for your feedback. We respectfully need to review how this request aligns with the agreed-upon scope of work to ensure we can deliver within the established parameters and timeline.

Level 2: We appreciate your vision for this project. Respectfully, implementing this new feature would necessitate a formal change request, allowing us to accurately assess the impact on both timeline and budget.

Level 3: We've carefully considered your suggestion. Respectfully, our original proposal, which was thoroughly vetted and approved, already addresses this concern with a more cost-effective and timely solution. Perhaps we can revisit Appendix B, 'Scope Exclusions'.

Level 4: I understand your expectations. Respectfully, any deviation from the signed Statement of Work at this stage will incur additional costs and require a revised delivery schedule. We need your approval on a formal change order.

Level 5: Respectfully, no.

Level 1: I appreciate you reaching out. I respectfully need to confirm how this task aligns with our team's established workflow and individual responsibilities before proceeding, to ensure we're all optimized.

Level 2: Thanks for flagging this. Respectfully, could you clarify the specific output you require, as my current focus is on [Project X], and I want to ensure I can assist effectively without impacting my deliverables?

Level 3: I understand you're looking for support on this. Respectfully, the last team meeting's action items clearly delineate ownership for this specific component to your workstream. I'm happy to 'advise' if you have specific questions, though.

Level 4: While I'd like to help, respectfully, this task is outside my current remit and would delay my own critical deadlines. I recommend revisiting the initial assignment criteria.

Level 5: Respectfully, find someone else.