The Business Case has many names and uses. However, it primarily provides the details of a certain amount of work and it’s expected benefits and costs. The BTABoK uses the NABC template (Need, Approach, Benefits, Considerations) as a Lean Business Case template which can be seen on a single page. It may still be necessary to use a larger document which will be added as another ‘canvas’ to the BTABoK though it will be in document formats.

AreaDescriptionLinks To
NeedThe need is a description of the drivers for the project. It should be driven from OKRs and should not include any of the approach section or proposed solution.  OKRs (derived from)
ApproachThe approach is the proposed solution to the need. It would contain a description of the product, project, or other proposed solution.  
Benefit(s)/ValueThe measured or expected benefits of the solution. Benefits Card (may use)
Costs(s)The expected costs of the solution, product or project.   
Return on Investment  
Considerations, Competition, Alternatives, Risks