Dissent in writing.
WHEN IT IS APPROPRIATE
When you believe a decision is wrong and the consequences matter.
WHAT TO ESTABLISH FIRST
Whether the decision is still open.
WHY
Arguing against a settled decision is different from contributing to an open one.
WHAT TO DO IF IT IS OPEN
State your position, with reasoning, to whoever decides.
WHAT TO INCLUDE
What you would do instead Why What you believe the risk is What would change your view
WHY THAT LAST POINT
It demonstrates good faith.
WHAT TO AVOID
Characterising the other position unfairly Arguing to several audiences separately Continuing after the decision is made
WHAT TO DO ONCE IT IS DECIDED
State your position once, for the record, and then support it.
WHAT THAT SOUNDS LIKE
Noting your concern, confirming you will proceed as decided.
WHY THAT IS THE RIGHT POSITION
It preserves both your integrity and the team's ability to function.
WHAT TO DO IF YOU BELIEVE IT IS SERIOUSLY WRONG
Escalate, explicitly, once.
WHAT TO DO IF IT IS UNLAWFUL OR UNSAFE
Raise it formally, through the proper route.
WHAT TO RECORD
Your position, and the date.
WHY
It matters if consequences follow.
WHAT TO AVOID
Saying nothing and then saying you always disagreed.
WHY
It is the least respected position available.