13.5. Case 1: Assessing the Impact of Business Goals
The basic problem here is to answer the following question.
The board of directors has set a goal for next year: $130 million of merchandise revenue and $3 million of ad sales. The question management wants to answer is whether the site has an adequate infrastructure to support the increase in revenue without compromising the quality of service.
To answer this question, we have to calculate the throughput x0, in transactions/sec, needed to generate $130 million of revenue as well as the average response time in case the site gets a volume x0 of transactions. As illustrated in Fig. 13.5, the first question is solved by transforming business goals into performance metrics, such as transaction ...
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