Plan A means starting a business and running it. Plan B means if your business does not go according to plan A, you have plan B to execute. When a business does not succeed, you will have to do a lot of things from shutting down your business, selling your business, inviting new partners, liquidating business, etc. Your plan B includes your possible methods to work in case your business does not go as you planned. Are you running a business, do you have a plan B for your business, what is your plan B? My plan is selling my business to another person