The Business Model Canvas, developed by Alexander Osterwalder and Yves Pigneur and published in their 2010 book 'Business Model Generation,' provides a single-page visual framework for describing, analysing, and designing business models. For designers working on product and service innovation, it is an essential tool for ensuring that a design concept is viable as a business proposition and not just desirable for users. It creates a shared language between design, strategy, and finance teams that dramatically accelerates alignment.