Control charts are used to determine whether or not a process is stable or has predictable performance. Upper and lower specification limits arc based on requirements of the contract. They reflect the maximum and minimum values ever allowed. There may be penalties associated with exceeding the specification limits. Upper and lower control limits are set between the project manager and appropriate stakeholders to reflcct the points at which corrective action will be taken to prevent exceeding specification limits.
Control charts can be used to monitor any type of output variable. Although used most frequently to track repetitive activities required for producing manufactured lots, control charts may also be used to monitor cost and schedule variances, volume and frequency of scopc changes, or other management results to help determine if the project management process is in control. Figure 8-3 shows a control chart that tracks recorded project hours. Figure 8-4 shows measured product defects compared to fixed limits.
Was this article helpful?
What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.