In reflecting upon the four phases of ISD, it seems to me the most difficult of the phases is development. In performing the analysis phase it should be relatively easy to establish what can be transferred as is into the online course, what needs to be modified and what needs to be created. Also quite easy is the course design specification were a blueprint for what needs to be accomplished in terms of instructional content, media, and presentations strategies. Also the evaluation phase or the fourth phase of ISD seems intuitively easy as well. However I suspect that development is the most of all the phases to accomplish. Finding the right blend, right media, the right instruction and presentation strategies and creating the module calls a seamless e-learning environment I think is the most difficult of all of the phases. Factors such as the nature of the content, the complexity of the concepts, and the interactions or relationships between theories are variables can make development very difficult. Topics that are highly visual can benefit from and pictures. Topics that are very complicated because there are a series of moving parts that make up the whole of the concept, may be best illustrated through animation or videos. Abstract concepts may require carefully crafted texts with multimedia presentations as follow-up. Combining the parameters of the course design specification and producing a seamless platform that optimizes media strategies is perhaps the most difficult of all the phrases of ISD. Here I would've like to see a specific example developed online to be able to understand better how to create this seamless environment. Perhaps the illustration of a good example and a poor example will help provide a better understanding on how to manage this phase. Essentially it's easy for me to understand what is intended and the development phase of ISD, but at the same time I suspect that I would need more practice and more examples to see exactly how this is done. Maybe in some of the upcoming iterations of this course it would be possible to see more specifics related to this phase.