Now that I have discussed an entire set of individual patterns, it is time to step back to look at one of the biggest problems in software development: handling variation within the problem domain. Design patterns can help analysts identify and organize variations successfully.
• Considers the problem of variation in the real world.
• Looks at a portion of the e-commerce case study that represents significant problems of variation. In the process of solving this problem, I develop the analysis matrix, a simple variant on decision tables that I have found ...