We're all adults (chronologically), and most of us are professionals. Ask us how changes will affect our work. Listen to what we have to say; we may not be in management, but that doesn't mean we don't know the business. Discuss possible alternatives that could lead to the same results, with less impact. Explain the business reasons for work changes.
One major tip: PLEASE! This is IT; don't use sports metaphors! If I hear you start talking about "getting the ball over the plate" and "basic blocking and tackling", you've lost me. I zone. Immediately. I'm already doing the basics; your job is to provide me everything we need to meet the customer's requirements.
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