Can SIPOC model help mapping business requirements?

There may be a better tool to use to map the future state of your business. In the past I have used flow diagrams in order to map out current processes and identify areas of improvement. From the flow diagram you can then identify the inputs/outputs and then format a new SIPOC. I do like your thought process. The SIPOC is a great tool and if used correctly can capture all levels of your process. Best wishes.

If you are project manager your focus are project requirements. If you are business analyst then your focus are product/service/result requirements that will be taken by the project manager to create project requirements. What you stated belongs to business analyst. If that is the case then let me say that you will find business requirements inside the result of the gap analysis between the actual business architecture and the future business architecture taking into account that architecture is defined by the strategy. Time ago I wrote an article about how to create the solution using enteprise architecture that was published by the PMI and the IIBA as "best practice". In that case I explained how to do that by using Tom Peter`s Seven S model as a tool.

SIPOC is a great tool, it can be evolved over time by repetitive iterations until you reach the final outcome and if used correctly it captures all levels of your process.

Thanks sharing your insight Sergio! Can you please refer me the link, I would love to refer to a best practice,min order to understand if I was lacking in something.