We have just finished writing a new report, called Designing Mobile Apps: A Roadmap for Businesses, which will be available from Ark Group very soon. The focus of this report is on designing mobile apps for employees and business partners (rather than for consumers or marketing purposes). One of the key issues that the report addresses is the situated nature of mobile computing - beyond the obvious differences such as screen size, this means that designing mobile apps is different from designing tools that will be used only on a desktop computer. This diagram is one of many we included in the report and provides a summary of the four critical success factors for enterprise mobile app design.