A summary business plan is 10 to 50 pages long and works best for companies that are very early in their development and are not prepared to write a full plan. The authors may be asking for funding to conduct the analysis needed to write a full plan. Ironically, summary business plans are also used by very experienced entrepreneurs who may be thinking about a new venture but don’t want to take the time to write a full business plan. For example, if someone such as Mark Zuckerberg, the founder and CEO of Facebook, was thinking about starting a new business, he might write a summary business plan and sent it out to selected investors to get feedback on his idea. Most investors know about Zukerberg’s success with Facebook and don’t need detailed information.