![]() ![]() If you have to choose between different types of aircrafts, what the various factors that you’ll have to consider? Do you have to worry only about the cruising speed – how fast the craft flies, or do you have to worry about how far the car craft will fly – the flight range., or look at how big these aircrafts are and how many people can be transported at one point of time from one place to another place. Say, for example, take an analogy from the airline industry. Performance means different things to different people. Our goal is to understand what factors in the architecture contribute to the overall system performance and the relative importance and cost of these factors. So, whether you’re looking at the designer’s perspective or purchaser’s perspective, both of them need to have some knowledge about the performance metrics and both require these performance metrics for comparison. Unless you have some idea about the performance metrics, you will not be able to decide which will be the best performance improvement that you can think of and which will lead to least cost and which will give you the best cost performance ratio. Similarly, from a designer’s perspective, you are faced with several design options like which has the best performance improvement, least cost and best cost/performance. When you look at the purchasing perspective, given a collection of machines, you’ll have to be able to decide which has the best performance, the least cost, and also the best cost per performance ratio. Performance is important both from the purchasing perspective and the designer’s perspective.
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