I'm currently writing up a design document which is essentially a 'plan of attack', however this doesn't strike me as a particularly professional or eloquent term for what I mean and my mind's gone blank as to the alternatives.
'Plan of action'? ...Still sounds too casual.
Strategy often goes down well these days.
The most popular peaceful word used in this context is roadmap, a document that presents the detailed timeline of given process.
A checklist may not be so official-looking but nevertheless a popular.
Battle plan may be taken a bit humorously if it's not really a battle.
strategy isn't bad, but may be a little too generic (encompassing solution to a family of similar problems)
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I would say that a plain old plan is perfectly good, but a course, a course of action, or a process might also work.
Is the plan of attack in a military context? If so, the term battle plan would probably be more suitable.
A phrase to consider using from a retired (combat veteran) Marine. OPERATION PLAN OR ORDER: A combat plan or order dealing with tactical operations and setting forth the mission of the unit; it deals with the commander’s decision, plan of action, and such details as to the method of execution as will ensure coordinated action by the whole command.
