The task of defining design options involves identifying, exploring, and describing different ways of meeting the business need. This includes defining the solution approach, identifying opportunities to improve the business, allocating requirements across solution components, and representing design options that achieve the desired future state. It is about considering various possibilities that could be created (building), purchased (buying), or a combination of both, to satisfy the business need. Reference: The information is based on the BABOK Guide, specifically the section on 'Define Design Options' which outlines the purpose and activities involved in this task12.