A business plan is literally the first thing you need to do when you have an idea for a business. The original idea needs to be developed so that you an others

A business plan is literally the first thing you need to do when you have an idea for a business. The original idea needs to be developed so that you an others are able to see if it makes sense or is complete nonsense. That's a business plan. Whether the business is about tech or about something else doesn't make it any different in that regard.