You typically start the content lifecycle by performing BI solution planning. You gather requirements to understand and define the problem that your solution should address, and arrive at a solution design. During this planning and design stage, you make key decisions to prepare for the later stages.
Which item types do you expect to create, and how many of each? For instance, will you create data items like dataflows or semantic models, reporting items like reports or dashboards, or a combination of both?
How is the content delivered to content consumers? For instance, will consumers use data items to build their own content, will they only view centralized reports, or a combination of both?
How complex is the content? For instance, is it a small prototype, or a large semantic model that encompasses multiple business processes?
Do you expect the scale, scope, and complexity of the content to grow over time? For instance, will the content encompass other regions or business areas in the future?
How long do you expect the business to need this content? For instance, will this content support a key initiative of the business that has a finite timeline?