Chapter 15: Tracking (Web page design) Project Performance 307 By defining
Chapter 15: Tracking Project Performance 307 By defining your acceptable upper and lower limits (your organization may determine these), you plot your data points on the control chart to reveal which data points fall above or below the acceptable limits representing potentially inefficient processes. These processes that display beyond the acceptable limits need to be fine-tuned. Control charts help you determine variation of processes and diagnose problem areas in projects. The benefits of control charts are (nearly) endless: To show whether schedule variances are within acceptable limits. To identify the volume of scope changes. To evaluate the number of days of variance in your schedule (are you 22 days behind where you said you d be?). To give a visual representation of dollars spent outside of budget. To show which problem items were found during individual phases of system testing. After the product is complete, you can use a control chart to show whether the number of configuration issues discovered during unit testing is outside of acceptable limits. You use your organization s or the client s quality standards (or a combination of both) for determining the upper and lower limits. Ask your project sponsor for the organization s quality standards. Look at Figure 15-2 for an example of a control chart. Figure 15-2: This control chart shows a series of data points that remain within the control limits. UpperControl Limit LowerControl Limit Mean Within the lowercontrol limit Within the uppercontrol limit
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