In an effort to be responsive to a number of requests for an update to my old manuscript for "Principles of Advanced Software Engineering: Variation-oriented Analysis, Design and Implementation", let me give you folks some background on the subject. [Background]Originally, I wrote a manuscript back in 1999-2000 and used it to teach my classes of Graduate students in computer science for my advanced software engineering class. Since then I and a number of my colleagues have written several articles on this subject and have extended it into various domains: Variation-oriented engineering, variation-oriented requirements analysis, VOAD for SOA Solutions in addition to the base variation-oriented analysis and design. This topic also relates to my work on patterns for stability and symmetry in software architecture which I was writing for the pattern languages of programming conferences. I also did a blog entry on VOA that describes the high level basics of this paradigm.[More Current] VOAD is an integral part of the SOMA method for building end to end enterprise and applications solutions based on SOA principles (whether or not you have a full SOA implementation in mind. VOAD intersects with another very important notion that I have been researching and applying on projects, namely, context-aware services (CAS). Manners externalize semantics for on-demand composition of context-aware services.Manners define the context-aware behavior that is needed in order to externalize component manners to achieve greater maintainability and reuse. This article shows how you apply VOAD in order externalize the changing aspects of the software, so you can decrease maintenance costs, enhance reuse and actually increase flexibility in design and implementation of your software solution. This is a rather popular article and has been cited in a number of other publications . I think this is because we show the practical application of VOA to create a dynamically reconfigurable architectural style. Also, I believe this element is one of the characteristics that will be needed in more mature SOA Solutions. So as organization's adoption increases, they will need more mature ways of doing SOA, and VOAD is a key to achieving that.Empowering the business analyst for on demand computing explores Grammar-oriented object design (GOOD) which is the way in which we apply VOAD for externalizing manners. This article describes a project we did in the public sector for harmonization of multiple redundant business processes across the world. This is immediately reminiscent of the value that VOA brings: one of which is to consolidate business processes and optimize them by eliminating redundancy.I suspect that is why I am getting these emails on putting more out there on VOAD and to update my older work to reflect the impact and opportunities for SOA. I get the message :-) and will do so.