Hi.
Seems kind of unusual for your executive management to delegate the writing of the business plan to a production manager. Typically, this is a senior level management document, to be used by senior management in the planning and execution of future business plans for the future success of your company. While I have no doubt that you are capable of writing it, it seems a bit odd.
I am not sure you will be able to develop a plan in two weeks. best I can tell you would be to look at the requirements that the standard calls out, and try to gather as much information as you can that already exists, and put that into some type of usuable format. Remember, the Business Plan is confidential...the auditors can't look at it, if you dont show it to them. My experiene is, that they will want to see evidence of its existence.....like maybe a table of contents or equivalent, and then in your Level II procedures, state your methods of tracking, updating, revising, etc. Also, you need to control the pan, per 4.5 This is relatively easy to do. COntrol it similar to your Quality manual.
Put together a format.....may be all the time you will have, prior to the audit. If your audit is pre-assessment, you will get a non-compliance perhaps, but that will give you time to develop it better, prior to the registration audit. If this is a registration audit, then your plan should already be in existence somewhere. Ask your senior management if they have any of hie types of data that should be included. THey may have something started already, and just not aware of it.
Hope this helps.
Bryon