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Comparing Technologies 91 When designing an application with a customer, this step is called creating the specifications (or just specs).At this point,the customer can still influence the layout of the application.This is very important because the application must meet the requirements listed in this step, or it won t be approved by the customer. The Customer Is Always Right, Even When He s Wrong Customers who contract you for an application often do not have enough expertise to design such an application by themselves, which is why they hire you.When discussing requirements with customers,guide them when they re suggesting bad solutions.For example,if the customer says, I want a chat that displays full-screen images of every chatter, refreshed at least every second, you might make this counter-suggestion: Wouldn t it be better to try to stick to thumbnail views next to each line? Most of your chatters won t have enough bandwidth to display full-screen pictures at all. But be careful; never insist on your point of view (except when customers want you to implement unrealistic features).After all, customers pay you to implement their vision.To avoid losing a contract,you may have to accept temporarily implementing a bad solution (when you see that you can t talk the customer into doing it the right way), and then later on change it when the customer sees that it won t work out using their strategy. For this project, you will take the role of the project manager and the authors will be your customers. Since we re nice customers, we won t keep insisting on nailing down further details of this application;we ll leave the rest of the design to you.Whenever this chapter hits a point where a choice or decision can be made, sit back and try to make your own choices. Closely evaluate all facts and then compare your results with the conclusions discussed in the book. Comparing Technologies Before even starting to think about code layout, there s a phase we don t know what else to call but getting things together. This is the intermediate step between the idea and the specs/code layout stage figuring out the inner workings and on what to base them. To make it clearer, let s go back to the very beginning: n What do we want to create? n How are we going to create it? n Are there any existing implementations of our idea already?

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