No, actually 'in working order' means 'operating normally', as in 'the printer is in working order' (the printer is operating normally/not broken). You could call this a document which isn't finished yet a 'working draft' or a 'work in progress', but both of these phrases are nouns. For example, for your second sentence you could say: "For now I can send you the working draft for your information, but you'll get the official document in due course." For your first sentence, you could use the phrase 'over the course of...'. For example, you could say, "We can discuss and solve the problem over the course of the day/week/project, your office is right next to mine. "

“Working” is correct, but “order” isn’t. You would typically say “working draft” or “working document”. “in due course” would mean after all the steps are completed, so it’s not specific. It’s not a phrase that someone who is hoping to receive something will usually want to hear. There’s a portion of the working document I’d like to discuss with you. Can you come over to my office to discuss some points in the working draft? We have a working draft and have to create a finalized document by the end of next week. Can we meet to go over the paragraph dealing with the ....? Note that we also have something called a “work order”. It’s paperwork ordering work. If someone speaking English with an accent said “working order” I would think of that. At our place of work, there is a leak in the sink in the bathroom. Be careful - the floor is wet. I’ve already filled out a work order to have maintenance come fix it.

No, actually 'in working order' means 'operating normally', as in 'the printer is in working order' (the printer is operating normally/not broken). You could call this a document which isn't finished yet a 'working draft' or a 'work in progress', but both of these phrases are nouns. For example, for your second sentence you could say: "For now I can send you the working draft for your information, but you'll get the official document in due course." For your first sentence, you could use the phrase 'over the course of...'. For example, you could say, "We can discuss and solve the problem over the course of the day/week/project, your office is right next to mine. "