What is process variation in VLSI?
Process variation is the naturally occurring variation in the attributes of transistors (length, widths, oxide thickness) when integrated circuits are fabricated.
How do you measure process variation?
Use the Range to Understand your Process Variation The easiest way to measure variation is the range. It is simply the difference between the highest value and the lowest value. For the ABC Pizza data, the range is the difference between 7.7 minutes and 6.5 minutes, which is 1.2 minutes.
What does FF ss sf fs TT process corners represent?
corners tt ff ss as montage said, they stand for typical, slow, and fast. since the transistors vary from lot to lot, we use these process corners to check the effects of process variation on our circuit.
What is process variation in Six Sigma?
Six Sigma Variation The natural variation or “common cause” variation is the natural fluctuations in process flow introduced by individuals, slight differences in execution, or instrument performance fluctuations. These are variations that can be addressed by process improvement and process control.
What are the two types of process variation?
There are two types of process variation:
- Common cause variation is inherent to the system. This variation can be changed only by improving the equipment or changing the work procedures; the operator has little influence over it.
- Assignable cause variation comes from sources outside of the system.
What is process variability?
Process variability is the measure of variation between units in manufacturing. Learn how variation is calculated based on statistical analysis and how the statistics are visualized and interpreted using histograms.
How do you compare variation in process performance?
The best tool to determine if the variation is Common Cause or Special Cause is the Measure Phase Control Chart. A Measure Phase Control Chart often is referred to as time series plot used to monitor a process over time.
Why is process variation important?
Process variation is important in the Six Sigma methodology, because the customer is always evaluating our services, products and processes to determine how well they are meeting their critical to qualitys (CTQs); in other words, how well they conform to the standards.
What are the 3 causes of variation?
Major causes of variation include mutations, gene flow, and sexual reproduction.
What are the types of process variations?