As for whether the consulting scheme is PPT or document format, it depends on what is provided. PPT version is generally used to report to customers, and is generally not a result document. But there are some. For example, McKinsey, the most famous consulting company, only provides PPT reports to customers. They think it is important to make it clear to customers that this document is not important. A report document of McKinsey may be only 100 pages, but the document supported by this document may exceed the height of an adult. This just shows the value of consultation.
Making a plan generally requires several steps, including investigation, discussion, finding problems, analyzing problems, finding solutions to problems, building a plan structure and adding content. You can learn from McKinsey's seven-step poetry and song writing method and find your feelings slowly.