A business model is a plan, it can include some of the following concepts:
A business model describes the rationale of how an organisation creates, delivers and captures value - starting from an idea. The business model core is about the conceptualisation of different elements and shows how you are creating value as a company. It is about what, how and when you do something. If we are unable to create, deliver or capture value, the business model collapses. Business planning in no longer a model in which you can, per se, mobilise resources and execute it due to the boom of open innovation.
Business models change because markets fluctuate and change, resources available change and recreating it is required. The business model offers a way to provide a response of the company to what the environment and the market are asking for.