Is the tolerance of a product specification the same as a control limit?

Control limits describe what a process is capable of producing (sometimes referred to as the “voice of the process”), while tolerances and specifications describe how the product should perform to meet the customer’s expectations (referred to as the “voice of the customer”).

What do control limits represent what do specification limits represent?

The control limits of your control chart represent your process variation and help indicate when your process is out of control. Control limits are based on process variation. Specification limits are based on customer requirements. A process can be in control and yet not be capable of meeting specifications.

What does it mean when the upper and lower control limits lie outside the specifications limit for a process?

out of control
When points on a control chart move outside the upper or lower control limit, the process is said to be “out of control.” As long as the points are within control limits, the process is “in control.” But, what does an out of control process indicate? Many believe that an out of control process produces defective parts.

What is the difference between control limits UCL and LCL in the control chart and customer specifications USL and LSL?

The UCL or upper control limit and LCL or lower control limit are limits set by your process based on the actual amount of variation of your process. The USL or upper specification limit and LSL or lower specification limit are limits set by your customers requirements.

What are upper and lower control limits?

Control limits are the horizontal lines above and below the center line that are used to judge whether a process is out of control. The upper and lower control limits are based on the random variation in the process. Control limits are based on process variation. Specification limits are based on customer requirements.

What is the upper control limit and lower control limit?

The upper horizontal line of the control chart, referred to as the upper control limit, and the lower horizontal line, referred to as the lower control limit, are chosen so that when the process is in control there will be a high probability that the value of a sample mean will fall between the two control limits.

How does Taguchi’s belief about quality differ from the traditional view quizlet?

How does Taguchi’s belief about quality differ from the traditional view? The cost of poor quality increases as the output approaches the specification limit. What happens when a process is not stable?