Disagree with your manager's decision professionally

Your manager has made a call you think is wrong and you want to say so without damaging your standing. This rewrites your message three ways, assertive that presents your alternative with evidence, diplomatic that respects the decision while raising the concern, and a middle version, so you can disagree in the register that keeps you credible.

My manager has made a decision I disagree with and I want to raise my concern without damaging the relationship or my standing.

The decision or policy: {DECISION_DESCRIPTION}
My concern with it: {MY_CONCERN}
What outcome I would prefer: {PREFERRED_OUTCOME}
My draft message: {MESSAGE_DRAFT}

Rewrite this message in three versions:
1. Assertive: makes the disagreement clear, presents an alternative view with evidence
2. Diplomatic: respects the decision while opening a door to reconsider, frames it as input
3. Neutral: asks clarifying questions that surface the concern without stating disagreement outright

Label each version clearly. Keep all three under 150 words each. End with one sentence on when each approach is strategically wisest.