When compiling a budget for a new bungalow build, there are many factors to consider. Primary construction costs include items such as materials, appliances, HVAC and plumbing and are usually the largest part of the budget, up to 50 percent in most builds.
Statistical process control (SPC) is a method of quality control which uses statistical methods. SPC is applied in order to monitor and control a process. Monitoring and controlling the process ensures that it operates at its full potential.
After you identify and remove the assignable cause(s), collect additional data and recalculate the mean and control limits. Observe the control chart to confirm it is in statistical control. Continue plotting new data but do not recalculate the control limits. If the process does not change, the limits should not change. If you make changes to the process, recalculate the control limits to observe shifts in variation after the change. For example, imagine youâre interested in improving monthly customer satisfaction scores. You collect scores from August to November 2009 and plot the data in time series using an I-chart. The chart measures the process mean, and the control limits are calculated: