Dear Neil, Project Professional is not a requirement for Project Web Access, see System Requirements for Project Server. Regarding the difference between the two products, the Which Project 2003 Offering Is Right for You? page of the Microsoft Office Project 2003 does a pretty good job of summarizing the product features. Listed below is a brief summary:
Project Professional 2003 - If you think that your needs will grow and you will want to collaborate with others, then you should consider obtaining Project Professional 2003, which can integrate with Microsoft Office Project Server 2003. Project Professional 2003 provides all the capabilities in Project Standard 2003. In addition, when used with Project Server 2003 and Microsoft Office Project Web Access, it provides Enterprise Project Management (EPM) capabilities such as up-to-date information on resource availability as well as skills and project status.
Microsoft Office EPM Solution - The Microsoft Office Enterprise Project Management (EPM) Solution enables organizations to manage their project portfolio effectively, establish standards and best practices, centrally manage resources based on skills and availability, and enable effective communication and collaboration within project teams. An extensible, enterprise-scale architecture enables effective integration with other line-of-business (LOB) systems.
Cheers,
Mark Perry
VP of Customer Care
BOT International
